LL COOL J is an American rapper and actor. He released the albums Radio in 1985 and Mama Said Knock You Out in 1990. The title track from Mama Said Knock You Out won him the Grammy Award for Best Rap Solo Performance in 1992. He has released other albums and popular singles such as Murdergram Deux, Doin' It, and Headsprung. LL COOL J has also appeared in the film Last Holiday, the series Behind the Music, and the series NCIS: Los Angeles.