Ready to shake up their afternoon, BFF's Vanessa Hudgens and Ashley Tisdale were spotted arriving to the Millennium Dance Studio in North Hollywood, CA earlier today (February 2).

Keeping it casual and comfortable for their midday rehearsal, the "High School Musical" pals each dressed in super baggy sweat outfits as they headed inside for their shakin' abd movin' session.

In related news, Miss Hudgens has just put her custom Candie's Couture silk frock she wore to the 2011 MTV VMA's up for auction to benefit the well-deserving organization Stand Up to Cancer.

Speaking about her good deed, the 23-year-old told press, "Stand Up to Cancer is a charity that is very near and dear to my heart, and I had so much fun wearing this Candie's dress to the MTV VMAs last year, that I thought I should auction it off to support this fantastic cause!"