Rihanna has hit out at reports she is embroiled in a feud with her fellow R+b superstar Beyonce Knowles, and admits she finds such speculation "annoying".

The Umbrella singer is also horrified by gossip she is romantically involved with her music mogul mentor Jay-Z, who is Knowles' longterm boyfriend.

She says, "It actually gets annoying sometimes. At first it was funny, because I was like, 'This is insane.' But it gets frustrating after awhile."

"Now, I'm ignoring it, I'm getting better at doing that."

"But she (Knowles) is one of the sweetest women I've ever met."