VIDEO: Kelly Clarkson Performs 'Underneath the Tree' on THE VOICE

Related: THE VOICE, Kelly Clarkson, NBC

Kelly Clarkson performs "Underneath the Tree" from her new Christmas album on last night's The Voice on NBC. Check out the appearance below!

"The Voice" returns with the strongest vocalists from across the country invited to compete in the blockbuster vocal competition show. Celebrity musicians and original coaches Adam Levine, Christina Aguilera, CeeLo Green and Blake Shelton all return, while Carson Daly continues to serve as host.

The show's innovative format features four stages of competition: the first begins with the blind auditions, then the battle rounds, the knockouts and finally, the live performance shows.

During the blind auditions, the decisions from the musician coaches are based solely on voice and not on looks. The coaches hear the artists perform, but they don't get to see them -- thanks to rotating chairs. If a coach is impressed by the artist's voice, he/she pushes a button to select the artist for his/her team. At this point, the coach's chair will swivel so that he/she can face the artist he/she has selected. If more than one coach pushes his/her button, the power then shifts to the artists to choose which coach they want to work with. If no coach pushes his/her button, the artist is eliminated from the competition.

Once the teams are set, the battle is on. Coaches will dedicate themselves to developing their team of artists, giving them advice, and sharing the secrets of their success, along with help from their celebrity advisers. During the battle rounds, the coaches will pit two of their own team members against each other to sing the same song together in front of a studio audience.

VIDEO: Kelly Clarkson Performs 'Underneath the Tree' on THE VOICE

More On: Kelly Clarkson, The Voice, Adam Levine, Christina Aguilera, CeeLo Green, Blake Shelton, Carson Daly, USA, Horizon.

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