UPDATE 3: Katy Perry has been added to the performer list, Capitol Records announced Monday.
UPDATE 2: Bruno Mars has been added to the Grammy Awards' performer list, organizers said on Wednesday.
UPDATE: Adele has been announced as a performer at this year's Grammy Awards.
Metallica are up for one award at this year's Grammys, with their "Hardwired" nominated for Best Rock Song. The band promised it has "something very unique and special planned for this celebratory night," but didn't go into further details.
On the Metallica site, the band said, "First, it was a total honor to be nominated, but now this?!!? We’re beyond excited that we have been invited to perform on the 59th annual Grammy Awards telecast ... It's been three years since we were lucky enough to participate in the awards show when we last performed with world-renowned Chinese concert pianist Lang Lang and we’re thrilled to be asked back."
Underwood's "Church Bells" is vying in the Best Country Solo Performance category, while Urban netted a pair of nods, Best Country Album for Ripcord and Best Country Solo Performance for "Blue Ain't Your Color."
The 59th annual Grammy Awards, hosted by James Corden, take place February 12th at Los Angeles' Staples Center. Beyoncé leads this year's field of Grammy hopefuls with nine nominations, with Drake, Rihanna and Kanye West each garnering eight nods apiece.