Chris Brown tests positive for marijuana, court hears

Video caption, Judge tells Chris Brown: "A lot of people look up to you, a lot of kids, and your conduct is important"

Chris Brown will have his probation for assaulting Rihanna in 2009 looked at again in November after testing positive for marijuana.

A judge in Los Angeles will decide whether he has violated the terms of his court order.

Brown, 23, tested positive for cannabis in June in the US state of Virginia, where he's doing his community service.

The star was sentenced to five years probation after admitting an assault on then-girlfriend Rihanna.

Brown produced a marijuana prescription card from California after testing positive.

The state is among 16 in America that allows cannabis to be used for medical purposes.

His lawyer, Mark Geragos, said his client had "completed all of his community service" which included picking up rubbish, washing cars, painting and mucking out stables.

A court will also look at whether he has broken travel restrictions by flying to France.

Los Angeles Superior Court judge Patricia Schnegg warned Brown that he was seen by many young people as a role model.

She said: "You are not an ordinary person who can sit in your living room and do whatever you want to do.

"More importantly, a lot of people look up to you, a lot of kids.

"What you do and what you say impacts a lot of people."

The singer was sentenced to five years probation and six months community service after pleading guilty to criminal assault for beating Rihanna up before the Grammy awards in 2009.

He has already completed anger management and domestic violence counselling.