I would definately say Hangover 2. I figured that it would be as good as the last one, but I was really let down. Yes, it had its funny parts here and there, but in the end, it was just like the first Hangover. It seemed like almost the exact same story, just a different setting. I also didn't like the setting, I can't stand places like that. I know I'm being pretty critical of it, but it was not what I expected it to be.