Childish Gambino adds himself to the long list of rappers who check themselves into British radio host Tim Westwood’s show for a freestyle session. The show, which airs every Saturday night on BBC Radio 1, has Gambino rhyming over Usher’s “Lemme See” followed by French Montana’s “Shot Caller.” Watch what the former 30 Rock writer had to say in the clip above and his latest mixtape, Royalty, can be found here.