Rihanna will be shinning bright like a diamond at this years Grammy Awards. The pop superstar has been announced as a performer at this years show airing February 10th. Rihanna is nominated for three Grammys this year for the Best Rap/Sung Collaboration field (“Talk That Talk” with Jay-Z), Best Pop Solo Performance (“Where Have You Been”) and “Princess of China” with Coldplay at last year’s show. Check out Rihanna’s promotional clip after the jump…