Mariah Carey (James Devaney/WireImage)
Carey sang her 1994 song "All I Want for Christmas is You," which has become a holiday favorite. "All I Want For Christmas Is Youuuuuuu! w/ Santa at Christmas Tree Lighting in New York!" she tweeted just before the show.
Green performed tunes from his new holiday album, Magic Moment, including a track that features the Muppets. He also duets with a few humans on the album, including Rod Stewart, who made an appearance at the tree lighting ceremony as well, and Christina Aguilera, his fellow judge on "The Voice."
CeeLo Green (Gilbert Carrasquillo/FilmMagic)
Victoria Justice (Gilbert Carrasquillo/FilmMagic)
The 2012 Christmas tree (Gilbert Carrasquillo/FilmMagic)
Fun fact: Rockefeller Center has had a Christmas tree every year since 1933. The event was first televised in 1951.
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