Rihanna, Bruno Mars and Sting for Grammys collaboration
Rihanna, Bruno Mars and Sting will perform together at this year's Grammy Awards ceremony, organisers have confirmed.
"In case you missed, @BrunoMars @Rihanna + Sting (@OfficialSting) will be performing together at the 55th #GRAMMYs next Sunday," said the official Grammys Twitter account.
Orgainsers did not confirm any further details about the collaboration.
Ed Sheeran, Alicia Keys and Frank Ocean are already confirmed to perform.
The Grammys take place on Sunday 10 February in Los Angeles and LL Cool J is returning as host.
At the 2012 ceremony Rihanna sang Princess of China with Coldplay.
Although she is the centrepiece of the Grammy's advertising campaign, Rihanna has relatively few nominations in the ceremony's 81 categories.
Her current album, Unapologetic, was released after the nomination deadline, but her single Where Have You Been is up for best pop solo performance - alongside the likes of Call Me Maybe by Carly Rae Jepsen and Stronger (What Doesn't Kill You) by Kelly Clarkson.
Mumford & Sons dominate the nominations for this year's Grammy Music Awards.
The British band have received six nominations for their second album Babel including best rock song and album of the year.
Jay-Z, Kanye West, Frank Ocean, Fun and The Black Keys are also up for six awards.