A kung fu fighter in a disco

AND THE PIANO! It sounds like R's a hired entertainer at a v upmarket soiree and because he's singing in such a genteel, gentlemanly fashion none of the guests quite realise what the words are (apart from the girl(s) he's winking at from behind the piano)...until TI and T-Pain stumble drunkenly, but still suavely, in. The CADS!