Bring It On (2000)
I've seen bits and pieces of this on TV over the years, but I just recently watched the whole thing, uninterrupted. (Or maybe it was a little interrupted; I think I watched in on hulu.com, but it's not there anymore.) It's a pretty good high school flick, though more crass than I hope my own teenagers will be. (One can hope.) Possibly even up there with my all-time 1990s favorites, Clueless and 10 Things I Hate About You.