The L.A. City Attorney just filed the criminal charges against the singer.  In addition to the DUI charge, Bobby has been charged with 2 other crimes -- driving on a restricted license and driving a vehicle without a vehicle interlock device. The last 2 charges are the result of a prior DUI conviction in 2012.  Bobby was also convicted of DUI in 1996. Bobby was arrested at 1 AM Wednesday.  He was pulled over after driving erratically, and cops smelled alcohol in his ride. If convicted this time, Bobby faces up to 2 years in jail, although it's highly unlikely he'd get that much time. And one final thing ... Bobby is also facing a probation violation for the prior 2012 DUI.