Justin Bieber, Cee Lo Green and Michael Buble are among the stars performing on NBC's 14th annual Christmas in Rockefeller Center holiday special, tonight at 7pm on NBC. The performers will sing a mix of current hits and holiday classics during the show, which will feature the annual lighting of New York City's famed Rockefeller Center Christmas tree, which this year is 74 feet tall. Justin's performance, which features some special guests, was already taped, so he won't be there live -- bad news for the thousands of screaming girls who no doubt are heading to New York City Wednesday night in hopes of seeing the Bieb in the flesh.

Also on the bill for the special are American Idol alumna Katharine McPhee, Rock and Roll Hall of Famers Neil Diamond and Carole King, and Javier Colon, winner of The Voice. In addition, viewers will see the world premiere of Mariah Carey and Justin's new duet version of her hit "All I Want for Christmas Is You," from Justin's new album Under the Mistletoe.

Michael Buble has performed at Christmas in Rockefeller Center several times now, but this year will be special since this year he's actually released his first Christmas album.