Underwood hits a high note while performing in Atlantic City, N.J. Plus: Jen & Ben, Demi & Ashton, Joe Jonas and more

HAVING A BALL

Ryan Seacrest stops by Good Morning America Thursday in New York's Times Square, where he's hosting Dick Clark's New Year's Rockin' Eve. The ABC special will include performances from Willow Smith, Natasha Bedingfield, Ne-Yo and more.