Bruno Mars, B.o.B. and Janelle Monae have been added to this year's line-up of Grammy performers, an inside source tells Rolling Stone exclusively. They will join previously announced acts Eminem, Lady Gaga, Arcade Fire, Miranda Lambert, Katy Perry and Cee Lo Green at the February 13th ceremony, which will be broadcast live from the Staples Center in Los Angeles.

Indie Artists Score Majority of Grammy Nominations

Eminem leads this year's Grammy pack with 10 nominations, including Record of the Year, Song of the Year and Best Rap Song. Lady Gaga has six nominations, while Cee Lo and Katy Perry have two apiece.

The big question this year, however, is whether or not Britney Spears will be added to the line-up of performers: Her new single "Hold It Against Me" just debuted at Number One on the Billboard Hot 100.

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