1. Demi Lovato
This song is hard to sing because the vocalist has to live up to Mariah Carey but Demi Lovato did that when she covered the song. She added her own flavor into the song but also showed off her one of a kind musical style and vocal range. Carey set the bar high and this didn’t scare Lovato. She rose to the challenge and now has a Christmas classic on her hands.
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