You twerk those hips, lady!
But it seems that Dem was also grindin' her cougar ass up on ANOTHER man during the event, the seXXXy Lenny Kravitz (above)!
"[Demi] was most ready to party than anyone else in the room."
Demi was apparently acting VERY hyper all evening — she was seen clutching an energy drink most of the night — and constantly cozied up to Lenny on the couch while she wan't trying to stick her bum-bum in his face.
Well, we're glad Demi is obviously letting loose, and girl seemed to be having a ballz-to-the-wall good time…
But we hope Dems didn't have a little TOO much fun, you know, indulging in certain alcoholic/druggy poisons and whatnot!
[Image via Splash News.]