Chris Brown has found himself a replacement pop star girlfriend in the form of Girlicious member Natalie Mejia, it's claimed.

Just a week after pleading not guilty to assaulting then-girlfriend Rihanna, Chris was spotted partying in Los Angeles with the reality TV star.

Natalie - who starred in the Pussycat Dolls Presents: Girlicious - has refused to confirm or deny reports she and the Run It star are dating following his split from Rihanna.

She tells RadarOnline.com, "Things are going well between us... (He) has treated me like a gentleman at all times actually and there are no complaints."

Chris has also been romantically linked to his ex-girlfriend, student Erica Jackson.

But a spokesman for the troubled R&B star denies any romance: "There is no truth to this at all."

See Chris with his "ex" below