"Shake Ya Ass", also known by its clean title, "Shake It Fast", is the second single released from American rapper Mystikal's fourth album, Let's Get Ready. It also featured uncredited vocals from Pharrell Williams. It was released on July 18, 2000 and was produced by The Neptunes. The single was a huge success for Mystikal, peaking at number 13 on the Billboard Hot 100, number three on the Hot R&B/Hip-Hop Singles & Tracks and number seven on the Hot Rap Singles.