What's the song?!

Hello! I hope someone can help me. There's a music video which name I can't remember no matter how hard I try. I'll tell you a bit about it. There are a bunch of people in a house, a party I think, and the house is flooding little by little. At the end of the video, there's a guy singing and playing the guitar on the rooftop. It must from 2002, maybe, I'm not sure. Does someone know the name of the song/band?