"You Know What It Is" is a song by American hip hop recording artist 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 track. It debuted at #73 on Billboard's R&B/Hip Hop Songs on June 28, 2007, later peaking at #11. It later debuted on the Billboard Hot 100 at number 68 in July, later peaking at #34.