PRETTY IN PINK. The main differences are the sex roles are reversed, the tone is more serious and all the quirky little things that made PIP entertaining are removed.
If this was 1987 and I was a twelve year-old girl I would have probably found Stoltz's tender heart to be endearing, but as a pissed off adult here in good old 2955 (that's right I live in the future and I timeblog back to 2013) I found the entire thing to be completely unbelievable. Especially the ending. Wow! Talk about a complete 180. Anybody who's seen this movie knows what I'm talking about. [SPOILERS!!!] Stoltz is one-hundred percent focused on the cool girl for the entire film, even spends his life's savings to buy her a perfect date and then right when everything and I mean everything turns out right he walks triumphantly out of the big party with the cool girl all hot and bothered over him and then by chance he catches a glimpse of his best friend's eyes looking just a little moist and boom!!! I've been in love with you the entire time. The End. Say what?[END OF SPOILERS!!!]
Mildly entertaining 80's high school love film, but I was really distracted by how old everybody looked and just the fact that the story was so unoriginal. Not a bad film and I don't regret watching it, but there's much better stuff out there for you to spend your time on.