Brown's sentence will be served in his home state of Virginia. He will have to return to Los Angeles frequently to update a judge on his progress.
Brown was arrested hours after the February attack and pleaded guilty to felony assault in June.
Brown apologized to fans in a video released and said he has apologized to Rihanna, who did not appear in court Tuesday.
The judge says the chief of police in Richmond, Va., will supervise Brown's community labor directly.
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