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OFFENBURG, GERMANY - NOVEMBER 27: Singer Britney Spears performs during the Bambi Awards 2008 Show on November 27, 2008 in Offenburg, Germany. (Photo by Andreas Rentz/Getty Images)

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UNIVERSAL CITY, CA - AUGUST 09: Singer Britney Spears arrives at the 2009 Teen Choice Awards held at Gibson Amphitheatre on August 9, 2009 in Universal City, California. (Photo by Jason Merritt/Getty Images)

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UNIVERSAL CITY, CA - AUGUST 09: Singer Britney Spears arrives at the 2009 Teen Choice Awards held at Gibson Amphitheatre on August 9, 2009 in Universal City, California. (Photo by Jason Merritt/Getty Images)

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UNIVERSAL CITY, CA - AUGUST 09: Singer Britney Spears arrives at the 2009 Teen Choice Awards held at Gibson Amphitheatre on August 9, 2009 in Universal City, California. (Photo by Frazer Harrison/Getty Images)

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NEW ORLEANS - MARCH 03: **EXCLUSIVE COVERAGE** Singer Britney Spears performs onstage during the opening night of "The Circus Starring Britney Spears" tour at the New Orleans Arena on March 3, 2009 in New Orleans, Louisiana. (Photo by Kevin Mazur/Getty Images for Jive Records)

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NEW ORLEANS - MARCH 03: **EXCLUSIVE COVERAGE** Singer Britney Spears performs onstage during the opening night of "The Circus Starring Britney Spears" tour at the New Orleans Arena on March 3, 2009 in New Orleans, Louisiana. (Photo by Kevin Mazur/Getty Images for Jive Records)

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LONDON - FEBRUARY 16: A new waxwork (C) of Britney Spears is revealed at Madame Tussauds on February 16, 2009 in London, England. (Photo by Gareth Cattermole/Getty Images)

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LONDON - FEBRUARY 16: A new waxwork of Britney Spears is revealed at Madame Tussauds on February 16, 2009 in London, England. (Photo by Gareth Cattermole/Getty Images)

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LOS ANGELES, CA - DECEMBER 04: Singer Britney Spears (L) and host Adam Carolla speak on stage at the 'Light of the Angels' Holiday Tree Lighting Ceremony at LA Live on December 4, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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LOS ANGELES, CA - DECEMBER 04: Singer Britney Spears speaks on stage at the 'Light of the Angels' Holiday Tree Lighting Ceremony at LA Live on December 4, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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NEW YORK - DECEMBER 02: Singer Britney Spears performs on ABC's "Good Morning America" at The Big Apple Circus tent at Lincoln Center on December 2, 2008 in New York City. (Photo by Bryan Bedder/Getty Images)

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OFFENBURG, GERMANY - NOVEMBER 27: Singer Britney Spears performs at the Bambi Awards 2008 Show on November 27, 2008 in Offenburg, Germany. (Photo by Andreas Rentz/Getty Images)

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OFFENBURG, GERMANY - NOVEMBER 27: Singer Britney Spears, winner of bambi award, poses with the trophy at the Bambi Awards 2008 on November 27, 2008 in Offenburg, Germany. (Photo by Patrik Stollarz/Getty Images)

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UNIVERSAL CITY, CA - AUGUST 09: Singer Britney Spears arrives at the 2009 Teen Choice Awards held at Gibson Amphitheatre on August 9, 2009 in Universal City, California. (Photo by Jason Merritt/Getty Images)

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LOS ANGELES, CA - NOVEMBER 06: Singer Madonna, with special guest singer Britney Spears, performs during her Sticky and Sweet Tour at Dodger Stadium on November 6, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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LOS ANGELES, CA - SEPTEMBER 07: (UK TABLOID NEWSPAPERS OUT) Singer Britney Spears accepts an award at the 2008 MTV Video Music Awards on the Paramount Studios lot on September 7, 2008 in Los Angeles, California. (Photo by Dave Hoganr/Getty Images)

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LOS ANGELES, CA - SEPTEMBER 07: (UK TABLOID NEWSPAPERS OUT) Singer Britney Spears poses with the Best Female Video Award, Best Pop Award and Video of the Year Award for "Piece of Me" in the press room at the 2008 MTV Video Music Awards at Paramount Pictures Studios on September 7, 2008 in Los Angeles, California. (Photo by Dave Hogan/Getty Images)

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LOS ANGELES, CA - SEPTEMBER 07: Singer Britney Spears is shown on a large screen on stage at the 2008 MTV Video Music Awards at Paramount Pictures Studios on September 7, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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BEL AIR, CA - DECEMBER 1: Claus Hjelmbak, Britney Spears ,Alli Simms and Sam Lufti pose for a picture on the red carpet at The ScandinavianStyle Mansion December 1, 2007 in Bel Air California. (Photo by Toby Canham/Getty Images)

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BEL AIR, CA - DECEMBER 1: Britney Spears celebrates her birthday inside The ScandinavianStyle Mansion December 1, 2007 in Bel Air, California. (Photo by Toby Canham/Getty Images)

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LAS VEGAS - SEPTEMBER 09: Singer Britney Spears performs on stage during the 2007 MTV Video Music Awards held at The Palms Hotel and Casino on September 9, 2007 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)

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LAS VEGAS - SEPTEMBER 01: Singer Britney Spears arrives at the grand opening of the LAX Nightclub at the Luxor Resort & Casino early September 1, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

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LOS ANGELES, CA - NOVEMBER 21: Singer Britney Spears presents the award for "Soul/R&B Favorite Artist" on stage during the 2006 American Music Awards held at the Shrine Auditorium on November 21, 2006 in Los Angeles, California. (Photo by Ethan Miller/Getty Images)

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LOS ANGELES, CA - NOVEMBER 21: (EXCLUSIVE ACCESS) Singers Britney Spears (L) and Mary J. Blige pose backstage at the 2006 American Music Awards held at the Shrine Auditorium on November 21, 2006 in Los Angeles, California. (Photo by Michael Buckner/AMA/Getty Images for AMA)

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HOLLYWOOD - FEBRUARY 08: Singer Britney Spears (R) and husband Kevin Federline arrive at the SONY BMG Grammy Party held at The Hollywood Roosevelt Hotel on February 8, 2006 in Hollywood, California. (Photo by Vince Bucci/Getty Images)

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HOLLYWOOD - FEBRUARY 06: Musicians Britney Spears and Kevin Federline arrive at the 2006 Grammy Nominees party with Kanye West, hosted By Verizon Wireless and Rolling Stone Magazine at the Avalon Hollywood, on February 6, 2005 in Hollywood, California. (Photo by Matthew Simmons/Getty Images for Rolling Stone)

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LAS VEGAS - DECEMBER 8: Singer Britney Spears presents on stage during the 2004 Billboard Music Awards at the MGM Grand Arena on December 8, 2004 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)

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LAS VEGAS - DECEMBER 08: Musician Britney Spears and husband Kevin Federline arrive at the 2004 Billboard Music Awards at the MGM Grand Garden Arena on December 8, 2004 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)

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LONDON - APRIL 26: (UK NEWSPAPERS OUT) Pop star Britney Spears plays first night of her "UK Onyx Hotel Tour 2004" at Wembley Arena on April 26, 2004 in London. The tour is her first UK tour since 2000, and features her greatest hits alongside tracks from current album In The Zone. (Photo by Getty Images)

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MIAMI - MARCH 28: (U.S. TABS AND STAR MAGAZINE OUT) Singer Britney Spears performs onstage during Showtime's live broadcast of Britney's Onyx Hotel tour show at the American Airlines Arena March 28, 2004 in Miami, Florida. (Photo by Frank Micelotta/Getty Images)

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MIAMI - MARCH 28: (U.S. TABS AND STAR MAGAZINE OUT) Singer Britney Spears performs onstage during Showtime's live broadcast of Britney's Onyx Hotel tour show at the American Airlines Arena March 28, 2004 in Miami, Florida. (Photo by Frank Micelotta/Getty Images)

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MIAMI - MARCH 27: Showtime Chairman and CEO Matt Blank presents singer Britney Spears with an onyx necklace to commemorate Showtime's live broadcast of Britney's Onyx Hotel tour show at the American Airlines Arena March 27, 2004 in Miami, Florida. The Show will air live on Showtime Sunday March 28, 2004. (Photo by Frank Micelotta/Getty Images)

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LONDON - JANUARY 26: Britney Spears arrives at the 'blue carpet' launch of Pepsi's new TV commecial at the National Gallery on January 26, 2004 in London. The Gladiator-style advert stars Enrique Iglesias in the role of evil emperor with Pink, Beyonce and Britney Spears fighting in revealing outfits to music by Queen. (Photo by Bruno Vincent/Getty Images)

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CANNES, FRANCE - JANUARY 23: Britney Spears (L) gives an award to Madonna during the NRJ Music Awards ceremony January 24, 2004 in Cannes, southern France. (Photo by Bruno Bebert-Pool/Getty Images)

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CANNES, FRANCE - JANUARY 24: Singer Britney Spears arrives at the French NRJ Music Awards ceremony during the annual Midem music conference at the Palais des Festivals on January 24, 2004 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images)

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LOS ANGELES - DECEMBER 5: Singer Britney Spears performs at 102.7 KIIS-FM's 3rd Annual Jingle Ball at the Staples Center on December 5, 2003 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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NEW YORK - NOVEMBER 18: Singer Britney Spears is photographed during an in-store appearance to celebrate the release of her latest album, "In The Zone" at the Virgin Megastore in Times Square November 18, 2003 in New York City. (Photo by Mark Mainz/Getty Images)

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BURBANK, CA - NOVEMBER 17: Singer Britney Spears appears on "The Tonight Show with Jay Leno" at the NBC Studios on November 17, 2003 in Burbank, California. (Photo by Kevin Winter/Getty Images)

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HOLLYWOOD - NOVEMBER 17: Singer Britney Spears attends a ceremony honoring her with a star on the Hollywood Walk of Fame on November 17, 2003 on Hollywood Boulevard in Hollywood, California. (Photo by Vince Bucci/Getty Images)

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NEW YORK - NOVEMBER 10: Singer Britney Spears poses backstage at the 2003 Glamour "Women of the Year" Awards at the American Museum of Natural History November 10, 2003 in New York City. (Photo by Matthew Peyton/Getty Images)

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NEW YORK - SEPTEMBER 17: (US TABS AND HOLLYWOOD REPORTER OUT) Britney Spears poses at the Dieselstylelab Spring/Summer 2004 Collection at Bryant Park during the 7th on Sixth Mercedes-Benz Fashion Week September 17, 2003 in New York City. (Photo by Matthew Peyton/Getty Images)

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WASHINGTON - SEPTEMBER 3: Singer Britney Spears rehearses for the 2003 "NFL Kickoff Live from the National Mall" September 3, 2003 in Washington, DC. Thousands of U.S. military personnel are expected to attend the concert featuring Spears, Mary J. Blige, Aerosmith, Good Charlotte and Aretha Franklin September 4 in Washington, DC. (Photo by Frank Micelotta/Getty Images)

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WASHINGTON - SEPTEMBER 3: Singer Britney Spears attends a press conference for the 2003 "NFL Kickoff Live from the National Mall" September 3, 2003 in Washington, DC. Thousands of American military personnel will attend a concert featuring Spears, Mary J. Blige, Aerosmith, Good Charlotte and Aretha Franklin September 4, 2003 in Washington, DC. (Photo by Frank Micelotta/Getty Images)

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WASHINGTON - SEPTEMBER 3: Singer Britney Spears poses for a photo backstage after the press conference for the 2003 "NFL Kickoff Live from the National Mall" September 3, 2003 in Washington, DC. Thousands of American military personnel will attend a concert featuring Spears, Mary J. Blige, Aerosmith, Good Charlotte and Aretha Franklin September 4, 2003 in Washington, DC. (Photo by Frank Micelotta/Getty Images)

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NEW YORK - AUGUST 28: (U.S. TABLOIDS OUT) Singers Britney Spears(L), Madonna, Missy Elliot, and Christina Aguilera perform onstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)

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NEW YORK - AUGUST 28: (U.S. TABLOIDS OUT) Britney Spears (L) and Madonna pose backstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)

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UNIVERSAL CITY, CA - AUGUST 2: Singer Britney Spears poses backstage at The 2003 Teen Choice Awards held at Universal Amphitheater on August 2, 2003 in Universal City, California. (Photo by Frederick M. Brown/Getty Images)

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Britney Spears and Michael Jackson at the 2002 MTV Video Music Awards at Radio City Music Hall in New York City, August 29, 2002. Photo by Scott Gries/ImageDirect.

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HOLLYWOOD - JANUARY 28: Singer Britney Spears and actor Colin Farrell arrive at the premiere of 'The Recruit' at the Cinerama Dome on January 28, 2003 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

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Britney Spears won "Choice Female Artist" at "The Teen Choice Awards 2002" at the Universal Amphitheatre in Los Angeles, Ca. Sunday, August 4, 2002. Photo by Kevin Winter/Getty Images/FOX.

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Matt LeBlanc and Britney Spears at the Teen Choice Awards 2002 held at the Universal Amphitheatre in Los Angeles, Ca., August 4, 2002. (photo by Kevin Winter/Getty Images/Fox)

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NEW YORK - FEBRUARY 17: (U.S. TABS OUT) Singer Britney Spears speaks on stage during the first MTV "TRL Awards" at the MTV Times Square Studios on February 6, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)

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Michael Jackson and Britney Spears backstage at the 2002 MTV Video Music Awards at Radio City Music Hall in New York City, August 29, 2002. Photo by Frank Micelotta/ImageDirect.

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Presenters Britney Spears and Matthew Perry at the 44th Annual Grammy Awards at the Staples Center in Los Angeles, CA. 2/27/2002 (photo by Frank Micelotta/Getty Images)

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HOLLYWOOD - JUNE 28: Singer Britney Spears speaks on stage during MTV's "BASH" at the Hollywood Palladium June 28, 2003 in Hollywood California. (Photo by Robert Mora/Getty Images)

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SANTA MONICA, CA - APRIL 12: Britney Spears and Will Ferrell during Nickelodeon's 16th Annual Kids' Choice Awards at the Barker Hangar April 12, 2003 in Santa Monica, California. (Photo by Robert Mora/Getty Images)

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HOLLYWOOD, CA - February 14: Musician Britney Spears shops in Calypso at the Sunset Plaza on February 14, 2003 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)

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LOS ANGELES - JANUARY 13: Singer Britney Spears speaks on stage during the 30th Annual American Music Awards (AMA) at the Shrine Auditorium on January 13, 2003 in Los Angeles, California. (Photo by Vince Bucci/Getty Images)

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NEW YORK - DECEMBER 31: (TABS OUT) Musicians Britney Spears and Natalie Portman host a New Year's Eve Party at the Hudson Hotel December 31, 2002 in New York City, New York. (Photo by Matthew Peyton/Getty Images)

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NEW YORK - SEPTEMBER 22: Singer Britney Spears blows bubbles with her bubble gum during the House of Field Spring/Summer 2003 Collection at the New York Public Library during the Mercedes-Benz Fashion Week on September 22, 2002 in New York City. (Photo by Mark Mainz/Getty Images)

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WESTWOOD, CA - SEPTEMBER 17: Singer Britney Spears attends the film premiere of "The Four Feathers" on September 17, 2002 in Westwood, California. (Photo by Vince Bucci/Getty Images)

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MEXICO CITY, MEXICO - JULY 26: Britney Spears attends a news conference July 26, 2002 in Mexico City, Mexico. Spears will perform two concerts July 27 - 28, finishing up a summer North American tour. (Photo by Susana Gonzalez/Getty Images)

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404105 02: Singer Britney Spears attends the Australian premiere of her new film Crossroads April 18, 2002 at Fox Studios in Sydney, Australia. Crossroads is her first lead role in a movie. (Photo by Nick Laham/Getty Images)

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402718 04: Singer Britney Spears attends the Spanish premiere of her new movie Crossroads at the Kinepolis cinema March 21, 2002 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)