We've been forecasting T.I.'sTrouble Man for like a year and it's finally coming on December 18, and it looks like T.I.'s celebrating too by dropping this new single, "Ball," which features Lil Wayne, and it's the booty-clapping, twerk-ready Southern rap jam you've been waiting for. Tip and Wayne trade off snappy verses about the praises of a great night - the club's packed! the girls are drunk! - over the club-anthemest beat we've heard in quite some time. This one will likely be ubiquitous faster than you can blink - take a listen before you're hearing it everywhere.