Childish Gambino was on that J. Cole “Who Dat” beat and it’s just now surfacing. The song appeared on Peter Rosenberg’s What’s Poppin’ mixtape. Wish we could have heard this sometime sooner. Anyway, Peter Rosenberg’s full What’s Poppin’ mixtape can be checked out here. And for you Childish Gambino fans, you will be happy to know Donald signed a deal and will be releasing his new album Camp this November.