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RihannaConcert1Rihanna is back to work, gearing up for her big performance at the 55th Annual Grammy Awards.

She ran through rehearsals with Bruno Mars and Sting, who will share the stage with her at the Staples Center on Sunday. She also met up backstage with Damian and Ziggy Marley, posting the photo on Instagram.

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RiRi is nominated for three awards at this year’s ceremony including Best Pop Solo Performance and Best Rap/Sung Collaboration.

The Grammys will air live on Sunday on CBS with performances from Justin Timberlake, Frank Ocean, Alicia Keys, Maroon 5, Miguel, Wiz Khalifa, Taylor Swift, and more.