Following the announcement of the release date of G.O.O.D. Music's Cruel Summer -- September 4 -- Kanye West and 2 Chainz have dropped something else on us: "Birthday Song," the latest single from Chainz's debut solo album, Based on a T.R.U. Story, which will drop August 14 via Def Jam. Co-produced by Sonny Digital and West, the song has that deep bass that's become especially prevalent in Chainz's Georgia these past few years to go along with a hook that's about as deep as we're used to from the artist a.k.a. Tity Boi: "All I want for my birthday is a big-booty girl!" Stream it below.