Two of the music industry's most precocious stars and one of celebrity's hottest young couples, Rihanna and Chris Brown, bowed out of Grammy performances after the LAPD launched an investigation into Brown's behavior Saturday night. As the awards were under way, Brown, a 19-year-old R&B star with a squeaky-clean image, turned himself into authorities over a felony domestic abuse charge against an unnamed victim for an incident that occurred after Clive Davis' pre-party. On Sunday, both he and Rihanna pulled out of the awards, where both were nominated and scheduled to perform. People reports "the woman suffered visible injuries and identified Brown as her attacker" while Rihanna's rep said she is doing "well." The Insider, meanwhile, reported that Rihanna was bruised in a car accident Sunday morning.