Wondering why you didn't see Chris Brown and Rihanna at the Grammys last night? Probs because Chris got into some trouble the night before when he allegedly got physical with an unidentified woman after having an argument with her in his car. The woman called 911 and said that Chris had attacked her, but when police arrived, the "Forever" singer had already fled the scene. Earlier that night, Chris was with his GF RiRi the Pre-Grammy party in Beverly Hills, but neither of them made it to the actual awards show on Sunday. At about the same time Chris was supposed to perform at the show, he turned himself into the LAPD for felony battery investigation and posted $50,000 bail, according to People. Thank goodness Justin Timberlake and Al Green were there to take Chris's place on stage!