Funny Scripts for a birthday party?

I'm turning 15 in the middle of July, and want to do something original for my birthday. It's probably going to be around 8 girls, and I was thinking of acting out a mini play or short skits. We're all 15-16, so I'm looking for something more than childish but not dirty or anything. Either your original skits or your favorite scene from a movie, anything is appreciated! Thanks!