Brown Upset Rihanna Duet Has Leaked

R+B star Chris Brown is upset a new demo track has been leaked online - because it was destined to become a duet for him and his girlfriend Rihanna.

The teenager's new song Electric Guitar was an uncompleted track that he didn't want fans to hear until Rihanna had added her voice.

He says, "The record's not finished. It's supposed to be me and Rihanna's duet."