DEMI MOORE lets her hair down and go-go-GOs!

Demi, 50, sure knows how to have a blast, as she sucked down Red Bull after Red Bull with a wild night of dancing.

Clad in a one piece short-short, the awfully-thin looking Demi was getting her groove on to the music at the Chanel Beachside Barbecue at the Soho House in Miami for Art Basel AND was hanging with Lenny Kravitz reported.

Showing off her long legs, Demi was busting a move to the music, wildly dancing around, much to the amusement of Lenny and George Clooney’s GF Stacy Keibler.

Her rumored new artsy-fartsy boyfriend Vito Schanbel was also there and the couple were reportedly caught in some major PDA, but they were not pap snapped.

Demi remains not divorced from estranged husband Ashton Kutcher who makes no secret of his new GF Mila Kunis.

PHOTOS: Demi Moore Parties Hard In Miami