Chris Brown failed a drug test, but a judge has ruled against revoking his probation.

The singer - who is currently on probation after attacking his then girlfriend Rihanna in 2009 - tested positive for marijuana in June in Virginia, where the drug is illegal, but since he claims to have smoked it in California, where he has a medicinal marijuana card, Judge Patricia Schnegg has let him off with a warning.

However, in court in Los Angeles on Monday, Judge Schnegg ordered a review of his progress on November 1 amid concerns about how many community service hours he has completed and allegations he has violated the terms of his travel restrictions. She also urged him to consider how the public and his young fans perceive his actions, telling him "You are not an average person sitting in a living room. You are not only in the public eye, but you are on probation."