Grammys: Gwen Stefani & Adam Levine, Jessie J & Tom Jones, Hozier & Annie Lennox to Perform

Trae Patton/NBC
Adam Levine and Gwen Stefani on "The Voice" on October 20, 2014.

Who isn't performing at the upcoming Grammys? On Tuesday, Lady Gaga and Tony Bennett were added to the lineup to provide some duet flavor, and now they've got competition from three other pairings: Jessie J and Tom Jones, Hozier and Annie Lennox, and Gwen Stefani and Adam Levine.

So far, Pharrell, Sam Smith, Usher, Miranda Lambert, John Legend, Common, Madonna, AC/DC, Ariana Grande, Eric Church and Ed Sheeran have all been named to perform at the event on February 8th. LL Cool J will serve as host.