Chris Brown, Rihanna Cast Shadow Over Grammys

Feb. 9, 2009 — -- Sunday's Grammy Awards featured an impressive lineup of performances and pairings of some of the world's greatest musicians, including the night's big winners: Robert Plant, Alison Krauss and Jennifer Hudson.

But the real story of the night didn't unfold on stage: R&B star Chris Brown, who was scheduled to perform Sunday night, instead turned himself into Los Angeles police and was charged with felony criminal threats after a reported dispute with a woman earlier in the day.

He was released after posting $50,000 bail. The case will now be sent to the district attorney's office and further charges could be filed.

The woman involved in the incident, which was reported around 12:30 a.m. Sunday, has not yet been named. According to police, Brown and the woman were in a vehicle in the Hancock Park area of Los Angeles when, according to the victim, they became involved in an argument.

After stopping his car, police say, Brown and the woman got out and the argument escalated. The woman suffered "visible injuries" and identified Brown as her attacker.

The Los Angeles Police Department received a 911 call reporting the disturbance. When officers arrived they found the victim, but Brown had already left the scene.

The Los Angeles Times, citing police sources, identified the victim as singer Rihanna -- Robyn Rihanna Fenty -- a fellow R&B star and Brown's girlfriend. Rihanna also did not show up at the Grammys where she too was scheduled to perform.

Asked to comment on the reports of Rihanna's involvement in the reported altercation and her absence at the Grammys, the star's publicist told ABC News, "Rihanna is well. Thank you for concern and support."

Representatives for Brown did not immediately respond to ABC News' calls for comment.

Brown, 19, and Rihanna, 20, were reportedly all smiles at a pre-Grammy party hosted at record mogul Clive Davis' home Saturday night. The two have been dating for about a year.