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Fashion’s best kept secret, the effortlessly hip French label Isabel Marant, may be out thanks to Natalie Portman! The actress was spotted in one of our favorite looks from Marant’s Spring 2010 collection at last night’s RAAD Grey Goose party in L.A.. Portman traded the label’s cult fringed booties (they’ve been selling like mad ever since they hit Net-a-porter.com) for dressed-up patent leather pumps that added a perfect amount of sophistication to her bohemian glam tweed jacket and colorful minidress. Isabel Marant is bringing her enviable Parisian chic style stateside this month, opening a store in N.Y.C’s Soho district, and her fall collection is walking down the runway in Paris literally as we speak—we are waiting with baited breath for both!