August 25, 2010 05:30 PM

Courtesy Mark Cosmetics

On your mark, get set, go! Following in the stylish stilettos of former mark Cosmetics ambassador Lauren Conrad, the brand’s newest face, Ashley Greene, is stepping lively into her newest role–and the Twilight star is taking you behind-the-scenes of her debut shoot with the beauty brand. Watch below to see how a day’s worth of shooting produced the campaign at the top of the page, and keep an ear out for her short-list of beauty must-haves that she simply can’t survive a day without. Tell us: What do you think of Ashley’s debut ad for the brand? –Katherine Kluznik Rentmeester

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