I don't know what it is about this song that gets a party started so easily, but Juvenile's 1999 cut, "Back That Ass Up" is just classic booty music that defies the notion of booty music. Aside from the title, it's a hell of a well-composed song which features Juvie (who looks and sounds like Plies completely stole his style) at the pinnacle of his career.
There's some New Orleans unity in this video, which doesn't exist between certain Cash Money members the way it used to, as well.
Forget about coffee. If you want to wake up, just crank this video and you'll be wide awake in no time.