Diaz maintains a cheery outlook on a stroll through freezing New York City. Plus: Chace Crawford, Zac & Vanessa, Justin Timberlake and more

STAIR MASTER

Back from her Mexican getaway, Ashley Tisdale goes undercover after an appointment Monday in Encino, Calif.



Sign up for our daily newsletter and other special offers.
    Choose your newsletters
Thank you for signing up! Your request may take up to one week to be processed.
    see all newsletters