The Voice semi-finals are in full swing, and besides the Top 9 contestants, the show has some incredible performances prepared for next week.

Coach Gwen Stefani will take the stage on Monday (Dec. 7) for a special performance. While there is no confirmation as to what the star will sing, she will likely deliver her new single “Let Me Reintroduce Myself” for the first time.

The Voice stage will heat up even more on Tuesday (Dec. 8), when Brett Eldredge will join Kelly Clarkson for a festive rendition of “Under the Mistletoe,” before Jhené Aiko teams up with John Legend for “U Move, I Move” off the latter recent album, Bigger Love.

Catch both episodes of The Voice on Monday and Tuesday at 8 p.m. ET on NBC.