Any good party songs?

In norway we have something called the russ celebration, it’s a 17 day long party-marathon for the students that finishing the norwegian high school. It’s a truly great norwegian invention, watch this video and you’ll understand – http://www.youtube.com/watch?v=yQ2RzFVoDhA. This video is shot at one of many festivals we have over the country during this time. We all wear similar trousers, and graduating caps with our nicknames written on for 17 days in a row (without washing them). This video basically show how all these 17 days are going to be like – party party and after that, some more partying! So I’m just here to ask you for some good party songs I could add to my playlist which I’m going to be playing for this celebration-time. Old or new song, I’ll have a listen to whatever.