"Today" show anchors Matt Lauer, Savannah Guthrie, Al Roker and Natalie Morales host the live broadcast.

The hour-long event showcases holiday performances by Mariah Carey, Prince Royce, Darius Rucker, the Rockettes, Lady Gaga, Tony Bennett, Cyndi Lauper, Billy Porter, Seth MacFarlane, Sara Bareilles, Idina Menzel, Pentatonix, LeAnn Rimes and Trisha Yearwood.

The 82nd annual holiday extravaganza features an 85-foot tall Norway Spruce from Hemlock Township, PA. It is approximately 90 years old and weighs approximately 13 tons.

Prior to the primetime telecast, an additional live hour of the special will be broadcast on select NBC stations (7-8 PM); check local listings.

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Green is Universal, NBCUniversal’s sustainability initiative, and the Arbor Day Foundation will kick off their tree planting campaign “Share a Tree” during the “Christmas in Rockefeller Center” broadcast. Viewers are asked to participate by tweeting #shareatree or visiting greenisuniversal.com. For every tweet, like, share or comment, the Arbor Day Foundation will plant one tree, up to one million.