Rihanna: Performing at the Grammys!

Rihanna is white hot in a bikini while going paddle boarding in the beautiful waters of Hawaii on Wednesday (January 18).

It was just announced that the 23-year-old singer will take the stage at the 2012 Grammy Awards with Coldplay, presumably to perform their song “Princess of China”!

Rihanna is nominated for Album Of The Year and Best Pop Vocal Album for Loud, as well as Best Rap/Sung Collaboration for her songs “What’s My Name?” featuring Drake and “All Of The Lights” featuring Kanye West, Kid Cudi, and Fergie.

Coldplay is nominated for three Grammys, including Best Pop Duo/Group Performance for “Paradise,” and Best Rock Song and Best Rock Performance for “Every Teardop Is A Waterfall.”

In case you missed it, check out photos that RiRi tweeted of herself working out in a bikini!

FYI: Rihanna has a J Brand/Christopher Kane jacket tied around her waist!

20+ pictures inside of Rihanna paddle boarding in Hawaii…