Migos hosted a private "Black Tie Grammys" mansion party Saturday night in Beverly Hills that attracted a bevy of people including Chris Brown. TMZ reports that the R&B crooner bailed out when police showed up to break up the happening. 

C-Breezy went with main squeeze and model Vanessa Vargas to the jam-packed mansion. Since the address was publicly listed, the turn up attracted about 1,500 people, who all got close and personal. So much that Brown ended up chilling on an unknown blond woman's lap while Vargas looked on from a distance.

At 1:15 a.m., police got a phone call. It took them two hours to break up the party and write up tickets. Apparently, Brown was already driving away when officers knocked on the door. It isn't clear whether Vargas was with him when he left.