Ariana Grande
Ariana Grande
(© Tristan Fuge)

Rockefeller Center will light its world-famous Christmas Tree for the 81st time on Wednesday, December 4, with a little help from an all-star lineup of the entertainment industry's greatest singers.

Joining hosts Matt Lauer, Savannah Guthrie, Al Roker, and Natalie Morales, the televised broadcast (7-9pm EST on NBC) will feature the vocal talents of five-time Tony Award winner Audra McDonald, Broadway veterans Ariana Grande and Toni Braxton, along with Mary J. Blige, Mariah Carey, Kelly Clarkson, Kenny "Babyface" Edmonds, the Goo Goo Dolls, Jewel, Leona Lewis, and The Rockettes.

The 76-foot Norway Spruce tree, estimated to be more than 75 years old, will be decorated with 45,000 energy-efficient multicolored LED lights and topped with a 9½-foot-wide LED-lit Swarovski crystal star.