The last scene in The Kentucky Fried Movie. Heh heh heh.
Okay, serious answer, probably West Side Story, which obviously had great source material. Of more recent vintage, I'm fond of the film version of Stardust, which finds a slightly different way to talk about love than usually gets talked about.
Day 05 - A show you hate
That Jim Kramer thing on CNBC. Dude, DON'T F'IN SCREAM AT ME.