According to law enforcement sources Chris Brown severely beat his girlfriend Rihanna in the early hours of Sunday morning. Rihanna called 911 and identified Brown as her assailant but now is not cooperating with the investigation. Rihanna is said by law enforcement sources to have suffered 2 severe contusions to either side of her head, a bloody nose, split lip, black eye and bites to her arm and fingers. The singer has canceled scheduled performances. Brown was released on 50,000 dollars bail and will be represented by celeb attorney Mark Garagos.