Pop singer Chris Brown wore his serious face this afternoon when he appeared at the Los Angeles Superior Court. The 24 year-old star was requested by the Los Angeles County District Attorney's Office to have his probation revoked, after being involved in a hit-and-run accident with Olga Gure-Kovalenko back in May. The female owner of the Mercedes that was hit, said that Brown refused to give her his license, insurance and registration information. Brown was placed on probation for five years after physically abusing his ex-girlfriend Rihanna in 2009. This afternoon he was released on his own recognizance and ordered to appear back in court in August. If his probation is revoked in August then Brown will face four years in prison.