The star-studded 81st annual tree lighting extravaganza hosted by Matt Lauer, Savannah Guthrie, Al Roker and Natalie Morales. Performances from Mary J. Blige, Toni Braxton, Mariah Carey, Kelly Clarkson, Kenny “Babyface” Edmonds, Goo Goo Dolls, Ariana Grande, Jewel, Leona Lewis, Audra McDonald and The Rockettes.