Vanessa Hudgens and Hayden Panettiere in the same Alice + Olivia Sequin Strap Dress.
Ashley Tisdale and Kelly Clarkson in the same BCBG Max Azria dress.
Vanessa Hudgens and Amy Winehouse in the same Betsey Johnson Glamorous Leopard Dress.
Vanessa Hudgens and Paris Hilton in the same Diane von Furstenberg 'Wendeline' dress.
Vanessa Hudgens and Olivia Thirlby in the same Jay Godfrey One-Shoulder Bow Dress.
Ashley Tisdale and Nicky Hilton in the same Kate and Kass Alice B. Toklas dress.
Ashley Tisdale and Audrina Patridge in the same LaRok Wendy dress.
HEAD TO HEAD!!!
Miley Cyrus and Amanda Michalka in the same Juicy Couture Sequin Stripe Boat Neck dress.
Vanessa Hudgens and Miley Cyrus in the same Bebe Draped Sequin Dress.
Vanessa Hudgens and Ashley Tisdale in the same Alice + Olivia Paillette Mini Dress.
Sources: vanessa-pictures.org, ashleypictures.net, mileyfansgallery.com, celebritystyleguide.com, betseyjohnson.com.