Rihanna & Chris Brown

© Sipa

This one took us by surprise (we thought she was dating Josh Hartnett!): R'n'B sex bomb Rihanna and rapper Chris Brown have got it on. Chris worked with Rihanna on her smash hit Umbrella, and has freely admitted to fancying the gorgeous Barbados star, but all we got was some rumour of a flirtation last year...
Until now! Their relationship is now official, after Chris sang for Rihanna at her 20th birthday party in Barbados (see photo) and the twosome were spotted spending some quality time together in a swimming pool on holiday.

The chances of it lasting? We say: 6/10