2 Chainz is pulling out all the stops before the August 14th release of his debut album, Based on a T.R.U. Story. Following up his Drake-assisted first single, "No Lie" and his high profile collaborations with G.O.O.D. Musicand Nicki Minaj, the eccentric rapper has posted up his next single, "Birthday Song," featuring senior labelmate Kanye West. Produced by West and Sonny Digital, "Birthday" booms and stutters without ever really going anywhere. The verses and hooks from two capable rappers aren't compelling enough to return to, but devotees should still take a listen.