Chris Brown and Jamie Foxx turned Malibu's fanciest sushi restaurant into a Vegas nightclub -- grabbing the mic for an impromptu version of "Gold Digger" ... and the crowd went nuts!
Jamie and Breezy jumped on a stage at the famous Nobu in Malibu ... and did a bunch of hits for a Saturday night party.
Tyga was there too and dropped "Rack City" on the packed restaurant.
Imagine ordering that night -- l'll have the yellowfin tuna, a California roll, wasabi beans and for dessert ... 3 superstars on stage.
Gotta love life in the 'Bu.