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

  • STAIR MASTER photo | Ashley Tisdale

Credit: Hot Shots Worldwide/Splash News Online

Published: Tuesday Mar 03, 2009 | 05:00 PM EST

STAIR MASTER

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



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