Last week, the "California Gurl" singer hit up Paris Fashion Week wearing the French label's white and gold long-sleeve mini with strappy sandals, a box clutch and her bright blue hair, natch. Katy inserted foot into mouth when she described her look as "Vegas hooker." Oops, faux pas!
Back in August, fierce fashionista Zoe rocked the same Balmain dress in gold with white accents to the Colombiana screening in Miami. Only, she left the neckline open down to her belly for a supersexy look, and added a white train and strappy black heels.
So which star looks hotter in this dress, the pop star or the actress?