"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."