The arrival of the holidays wouldn't be complete without a dazzling display of musical talent and the lighting of the world's most famous Christmas tree, hosted by "Today" show anchors Matt Lauer, Savannah Guthrie, Al Roker and Natalie Morales. The star-studded tree lighting extravaganza will feature musical guests including Lady Gaga & Tony Bennett, Cyndi Lauper, Seth MacFarlane featuring Sara Bareilles, Idina Menzel, Pentatonix, LeAnn Rimes and Trisha Yearwood performing current hits and holiday classics from Rockefeller Center in New York City.