Fashion Faceoff

Alexa Chung and Jena Malone wear the same Valentino gown (with slightly different undergarments). Plus, two denim showdowns and more star matchups that need your vote

KIERNAN VS. HARLEY

We can't blame the model-slash-DJ for mimicking Kiernan's style – especially since the teen star is on PEOPLE's Best Dressed list! But we love that each star gave her quirky Tanya Taylor skirt a distinctive spin.