Rihanna looked great as she was joined by Jennifer Nettles to perform a country version of her hit - California King Bed at the Mandalay Bay in Las Vegas.

It was a big night for Jennifer Nettles at the ACM Award show as her band Sugarland took home the ACM Duo of the Year award and she sang this duet with Rihanna.

The crowd went crazy at the ACM Awards second venue as Rihanna took to the stage and was joined at the end of the first verse by Sugarland's Jeniffer Nettles.