LIGHTING UP THE WORLD'S MOST FAMOUS CHRISTMAS TREE -- NBC once again heralds the arrival of the holidays with a dazzling display of musical talent and the lighting of the world's most famous Christmas tree during the 16th annual "Christmas in Rockefeller Center" telecast. The star-studded 81st annual tree lighting extravaganza will feature musical guests including Mary J. Blige, Toni Braxton, Mariah Carey, Kelly Clarkson, Kenny ‘Babyface’ Edmonds, Goo Goo Dolls, Ariana Grande and Jewel performing current hits and holiday classics from Rockefeller Center in New York City. Prior to the network special, WNBC, NBC's New York flagship station, and other NBC stations will broadcast an additional live hour of the special (7-8 PM ET.) "Christmas in Rockefeller Center" is produced by Brad Lachman Productions with Lachman serving as executive producer. Bill Bracken produces.