The second single was `` Get Buck '' , produced by Polow Da Don . The third single , `` U Ai n't Goin ' Nowhere '' , was released on May 18 2007 . The second single was `` Get Buck '' , produced by Polow da Don , and the third single , `` U Ai n't Goin ' Nowhere '' produced by Dr. Dre , was released on May 18 , 2007 .