"Sexy and I Know It" is a hit song by American duo LMFAO from their second studio album, Sorry for Party Rocking. It was released as the third single from the album on September 16, 2011. The song was written by Stefan Kendal Gordy, GoonRock, Erin Beck, George M. Robertson and Kenneth Oliver, and it was produced by Party Rock. It went to number one on the Billboard Hot 100 on January 7, 2012, and remained there for two weeks.