Cali rapper and record producer Iamsu! (he changed his name from just "Su" for search engine optimization) is best known as the leader of the Richmond hip-hop collective The Heartbreak Gang. But this year he's branching out on his own, with his debut studio album, Sincerely Yours, due out in April. His is a positive, pro-individuality brand of rap that's luckily more fun than preachy, as evidenced on his new single "Only That Real," featuring 2 Chainz and Sage the Gemini. Catch him at Pomona's Glass House, with p-lo, Skipper and Trav Walls opening.