R+b star Chris Brown has denied reports he engaged in sexual activity with his longtime manager Tina Davis at the age of 16.

Georgia-based blogger Sandra Rose claims the 18-year-old singer has been romancing Davis for more than two years, adding the teenage star's mom Joyce is "not at all happy" about their alleged relationship.

But a spokesman for Brown has strongly refuted the claims, branding the speculation "false".

A statement reads, "Chris Brown and his manager Tina Davis have a strictly professional relationship. Ms. Davis has been instrumental in helping Chris achieve success as a multi-talented singer/dancer/actor.

"Rumours that the relationship goes beyond a working one are not only patently false, they diminish her efforts and his undeniable talents."