Justin Bieber, Bruno Mars, and Muse were just added to the list of performers for this years Grammy Awards. Justin Bieber will be singing alongside Usher and Jaden Smith while Bruno Mars pairs up with B.o.B. and Janelle Monáe.
The Grammy Awards promises memorable collaborations for the 2011 awards show. They will join previously announced performers: Eminem, Lady Gaga, Katy Perry, Arcade Fire, Cee Lo Green and Miranda Lambert.