Rihanna worried about Chris Brown after fight
Brown is being investigated by Los Angeles police for assault after he and Frank got into a fight on Sunday over a parking spot at Westlake Recording Studios, reported Showbizspy.
"Rihanna wasn't there and she doesn't have anything to do with that. She hopes both Chris and Frank are all right," a source said.
Brown is still on probation after physically assaulting Rihanna in 2009.