"You Know What It Is" is a song by American rapper T.I., released July 10, 2007, as the second single from his fifth studio album T.I. vs. T.I.P. (2007). The song was produced by Jerry "Wonda" Duplessis and Wyclef Jean, the latter of whom contributes vocals throughout the hip hop track. The single peaked at number 34 on the US Billboard Hot 100.