Rihanna and Chris Brown team up on two songs

Rumours that Chris Brown and Rihanna are working on music together have now been confirmed.

Chris Brown features on a remix of Rihanna's Birthday Cake, while Rihanna returns the favour on a remix of Brown's latest single Turn Up The Music.

The shock news comes after Brown's recent return at the GRAMMY Awards, two years after he was convicted of assaulting Rihanna, his girlfriend at the time.

Brown's return was already controversial, but that Rihanna appears to have forgiven him is likely to provoke an even greater reaction from fans and observers.