Day 1 - your favorite song
That changes fairly often, y'know, and it's hard to narrow down. But there are a few that I always come back to. I was going to say "Well That Was Easy" by Franz Ferdinand but there are no good vids of it up, so for the sake of sharing I'm gonna go with my second choice, also by FF--"Bite Hard".
http://www.youtube.com/watch?v=vHh0r-1L9eI