Had to post this one since people like this song. (plus the music video is hysterical) Dem Slackers really tears this song up and makes a whole new version. Download below:
Katy Perry – Last Friday Night (Dem Slackers Remix) (if its not working try the Soundcloud download with the arrow to the right)
BONUS:
Dem Slackers – Swagger (Matt Sayers Remix)
Feed Me Noise 