It's official! Rihanna has confirmed on her Twitter page that she will join rockers Coldplay for a special performance of their collab song Princess of China at next month's Grammy Awards ceremony, reports Digital Spy. "My friends @ColdPlay and I will be sharing the stage for a performance at this year’s Annual Grammy Awards!" she wrote, later adding, "WE reached 2BILLION views on @youtube !!! THANK U!!! I'm in a great mood, and I got some GREAT NEWS!!! PRINCESS OF CHINA #GRAMMYS2012." Coldplay's Chris Martin has previously stated that Princess of China is the highlight of his band's CD Mylo Xyloto. It's also been confirmed that LL Cool J will host the 54th Grammy Awards, taking place on Sunday 12 February at the Staples Centre in Los Angeles. Channel O will be broadcast the awards LIVE from 3:00am on Monday 13 February 2012.