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New slate of stars added to Grammys 2015 performance bill

Viewers should prepare for a lot of performances at the 2015 Grammy Awards on Sunday as a new slate of acts have been added to the bill.

Beck will take the stage with Chris Martin of Coldplay, while Mary J. Blige will duet with Sam Smith, one of this year's top nominees. Country singer Brandy Clark will perform with Dwight Yoakam, and Herbie Hancock, John Mayer, and Questlove will team with Ed Sheeran. Jeff Lynn's ELO will also play with Sheeran.

Superbowl halftime star Katy Perry is also expected to perform.

They join an already crowded lineup that includes Tony Bennett, Lady Gaga, Tom Jones, Adam Levine, Madonna, Paul McCartney, Sia, Rihanna, Kanye West, Usher, Pharrell Williams, Juanes and Miranda Lambert.

Beyonce, Smith and Pharrell top this year's nominees with six nods each.

LL Cool J will host the show, set to air live on CBS from 8 p.m. - 11:30 p.m. ET.

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