Macy Gray put together an impromptu private party with a bunch of Chippendales hunks ... and she had the guys act as her backup dancers as she belted out some tunes!!!
Sources tell TMZ ... Macy was having dinner with some friends Wednesday night in Vegas when they had the idea to celebrate the world opening back up, so she enlisted the male revue.
We're told Macy rented out the Star Piano Cocktail Lounge, with a few requests ... 5 Chippendales dancers and enough musical equipment set up for a gig.
Macy and her crew rolled up to the piano bar at 10:30 PM and stayed until about 1 AM ... singing some Fugees and even some of her own hits like "I Try."
With Macy showing off her pipes and playing the piano, the Chippendales did what they do best ... dance.
We're told the booze was flowing ... Macy bought a bottle of Casamigos tequila and a bottle of Champagne ... and she cracked jokes in between songs.
Gotta love Sin City!!!