NBC kicks off the holidays with the lighting of the iconic tree in the heart of New York City on the 86th annual "Christmas in Rockefeller Center." The evening will include festive musical performances from Diana Ross, Tony Bennett & Diana Krall, Brett Eldredge, Darci Lynne Farmer, John Legend, Ella Mai, Martina McBride, the New York City Ballet’s production of “George Balanchine’s The Nutcracker,” Pentatonix, Kellie Pickler, Rob Thomas and the Radio City Rockettes in the annual celebration. NBC’s “Today” anchors Savannah Guthrie, Hoda Kotb, Al Roker and Craig Melvin are set to host. Billy Porter as well as the PAL Cops & Kids Chorus in New York City, with a special introduction by Tony Danza, will also lend their voices to the additional live hour of the special to be broadcast on select NBC stations.