LL Cool J
hosts Spike TV's series Lip Sync Battle
, premiering April 2, and the NCIS: Los Angeles
star stopped by ET to dish on what viewers can expect.
"It's really simple," LL said, explaining the concept of the show. "It's two celebrities and the audience decides who lip syncs the best."
Inspired by Jimmy Fallon's late-night sketches, contestants have included Justin Bieber, Jennifer Lopez, Mike Tyson, Chrissy Teigen, John Legend, Common, Anna Kendrick and Dwayne "The Rock" Johnson.
"It's so much fun. So many A-list, great acts came out and just had a ball," LL gushed.
While most celebrities were game for the show's shenanigans, LL said a few were hesitant about doing the show.
"Nobody wants to go on there and look ridiculous," LL said. "But it was a lot of fun."
Watch the video for a clip of various contestants lip-syncing to one of LL's hits, 1990's "Mama Said Knock You Out."