These days many famous faces moonlight in advertising campaigns for noted brands. Think Kiera Knightley for Chanel’s Coco Mademoiselle or Jonathan Rhys Meyers for Hugo Boss’s fragrance Hugo Element. Scarlett Johansson once again represents Mango for its fall/winter 2010-2011 collection. And most recently, Julia Roberts’s first campaign with French brand Lancôme was revealed. The Pretty Woman star bats her lashes to promote Définicils Precious Cells mascara ($34), which any Erin Brokovich wannabe can pick up at The Bay.