RIHANNA is reportedly furious and "really upset" that ex-boyfriend Chris Brown has been ordered to stay away from her.

Brown, 20, was formally sentenced last Tuesday to five years probation for the February assault of the Umbrella hitmaker.

The singer was also sentenced to six months of community labor in Virginia after he pleaded guilty in June to one count of felony assault against Rihanna, 21.

Brown will spend 1400 hours removing graffiti and washing cars and has been ordered not to contact Rihanna (including by phone or through a third person) for the next five years. He also must stay 100 yards from her, unless they are both at an entertainment-related event, in which he must stay 10 yards away.

Rihanna, sources say, has been working to get Chris’s restraining order lifted.

"When Rihanna got word from her attorney that the judge refused to lift the ban, she was really upset," one insider told Britain’s Now magazine.