Elmo Accuser #2 -- Expert Booty Popper [VIDEO]

Just two days before he laid the legal smackdown on Elmo voice actor Kevin Clash -- claiming Clash sexually abused him as a teenager -- Cecil Singleton laid the smackdown on STAGE ... dropping it like it's hot at a NYC drag show ... and we got the video.

Cecil took the stage at Lips Drag Show on November 18th in what appears to be some kind of dance battle.

We only see Cecil's dance part -- but it's safe to say he won ... at least based on the guy's insane moves ... easily performing a split, and booty-popping his way back onto his feet.