I just watched The Hangover tonight with my GF and some friends. I know I know, a little late, but we are part of a club that gives you a discount if you wait a little bit to watch movies.
OMG that movie was so goddamn funny! I was floored. Best movie since 40-year-old virgin and Grandma's Boy. I LOL'd so hard the whole movie through. My favorite part was when the naked Asian dude jumped out of the trunk and beat them all half to death.
Sorry if you haven't seen it. If you haven't and you like raunchy-ass movies this is a must-see!