VIDEO: Demi Lovato Covers a Christmas Classic

Move over for a moment, Mariah Carey.

Demi Lovato is here to tell us what she wants for Christmas.

The X Factor judge performed over the weekend at the annual Christmas in Washington special, taking on a track made famous by her contemporary on American Idol.

Whose version do you like best? Listen to Mariah's classic first and then click Play on Lovato's cover below:

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  Mariah Carey - All I Want for Christmas
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  Demi Lovato - "All I Want for Christmas"