Ashley Tisdale kicked off the "Be Strong" challenge and unveiled her "Got Milk?" ad at The Grove Hollywood in California yesterday.

The "High School Musical" star donned a bright blue one-sleeved dress that accentuated her long skinny legs.

Ashley has appeared in the films "Aliens in the Attic," "Sharpay's Fabulous Adventure" and "Phineas and Ferb: The Movie."