NBC's annual 'Christmas in Rockefeller Center' celebrates music of the holidays

Lady Gaga & Tony Bennett, Cyndi Lauper, Seth MacFarlane featuring Sara Bareilles, Idina Menzel, Pentatonix, LeAnn Rimes and Trisha Yearwood set to perform

NBC will celebrate the lighting of the world's most famous Christmas tree with "Christmas in Rockefeller Center" Wednesday, Dec. 3 (8-9 p.m. ET).

"Today" show anchors Matt Lauer, Savannah Guthrie, Al Roker and Natalie Morales will host the live broadcast from New York City's Rockefeller Center, which will showcase holiday performances from Lady Gaga & Tony Bennett, Cyndi Lauper, Seth MacFarlane featuring Sara Bareilles, Idina Menzel, Pentatonix, LeAnn Rimes and Trisha Yearwood.

The 82nd annual holiday extravaganza will feature an 85-foot tall Norway spruce from Hemlock Township, Pennsylvania. 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 p.m. ET). Check local listings.

Once again, "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 will be 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 1 million.

This year when visitors go to http://www.greenisuniversal.com/ they'll come across a digital forest with hand-drawn trees from NBCU talent, including Roker, Morales, Alison Sweeney, Andy Cohen, Jim Cramer and many more. NBCU fans are invited to decorate and share their own digital trees, plus share NBC talents' customized trees. Each tree decorated, plus every "Like," share, retweet and comment, will plant a tree. All the social actions will also trigger donations from NBCU to Arbor Day, up to $25,000.