1. Darren Criss, Rebecca Black, Kevin McHale, Debbie Gibson, Corey Feldman, Hanson, and Kenny G cameo in [lastfm link_type="artist_info"]Katy Perry[/lastfm]‘s “Last Friday Night”

Photo by Neil Lupin//Getty Images

Really, with the amount of celebrities with cameos in Katy Perry’s “Last Friday Night (T.G.I.F),” it could just be extended to next year’s summer blockbuster. Or maybe it has. You never know the secret plans of movie execs these days.

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