Pulling out of Grammy Awards, Rihanna and Chris Brown will not be on-hand for this evening's music festivities.

According to breaking reports, Chris is being investigated in an alleged domestic violence felony battery incident - with insiders claiming that Rihanna was the victim.

According to the Los Angeles Police Department reports, Brown, 19, was "in a vehicle with an unidentified woman in L.A.'s Hancock Park neighborhood around 12:30 a.m. Sunday when they began arguing. Police say Brown and the woman got out of the car and the argument escalated. The woman, who had visible injuries, phoned 911 and alleged Brown attacked her."

Officers arrived to the scene to find the victim - while Brown had already fled. Of the incident, Rihanna's rep said, "Rihanna is well. Thank you for concern and support."

Meanwhile, the Recording Academy tells, "We have just been informed that Rihanna will not be attending tonight's 51st Annual GRAMMY Awards. We're sorry she is unable to join us this evening."