Embattled R&B star Chris Brown was tossed from rehab after reportedly hurling a rock through his mother's car window.

According to the latest update in the singer's probation report, Brown, who was seeking help for his temper troubles, was asked to leave the Malibu, California treatment centre after 13 days.

The documents, obtained by Tmz.com, suggest Brown and his mother disagreed about the amount of time he should spend in rehab - and he shattered the window of her car by throwing a rock.

Back in court on Wednesday (20Nov13), Brown was ordered to spend 90 days in rehab by a judge - a sentence similar to the one passed down to Lindsay Lohan earlier this year (13).

He will have to check into a court-approved live-in anger management rehab in Los Angeles and submit to drug testing.