There are a lot of performances this December 31, including Carrie Underwood, Blake Shelton, Teddy Swims and TLC.
Before the ball drops, Ryan Seacrest shares what is crucial to his "Rockin' Eve" broadcast and how his mom helps for USA TODAY's The Essentials.
Carrie Underwood will mark a milestone 20 years since she won "American Idol" by performing a biggest hits medley in Times Square.
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