Broadway performer Idina Menzel just graced the stage of The X Factor UK with jazz singer Michael Buble in a charming performance.

Tony Awards 2014 Best Dressed, Including Idina Menzel

The two stars made their way to the stage on Sunday where they sang their duet of "Baby, It's Cold Outside." Menzel started off with the song where Buble's shadow can be seen in the back as he sings along with her. He eventually comes out where the performers sing together while also letting out little comments to each other.

Menzel even took a second in the song to thank her partner for showing up where he tells her that he wouldn't miss this for the world. Menzel then admits that she's a little nervous now, but the two continue to push through the song as the audience cheers for them.

WATCH Idina Menzel & Michael Buble's Music Video For 'Baby, It's Cold Outside' Starring Two Kids

The performance wasn't perfectly equipped with the lyrics though since there were a couple times where the singers let out the wrong words. But that didn't stop them from enjoying each other's company.

As the stars finished their performance, they gave each other a hug and the audience raved for them.

The X Factor host Dermot O'Leary then came out and asked them if they've worked together before, which Buble says, "Tons." Menzel also said that this is the first time they've sung this song together publicly.

Check out the performance below as Menzel and Buble embrace the holiday season.