Ryan Seacrest

Get all the details for perfect NYE viewing tonight!

Celebrities are getting in on the #10YearChallenge fun, sharing old photos of themselves.

Xtina joins already-announced 'New Year's Rockin' Eve' performers like Camila Cabello, Halsey, and Shawn Mendes.

The official full lineup for 'Dick Clark's New Year's Rockin' Eve' has been announced.