Dream GirlLady Gaga dons a Marc Jacobs gown on the September 2012 cover of Vogue. Photographed by Mert Alas and Marcus Piggot, with styling by the inimitable Grace Coddington. We adore the silhouette and hue of the Marc Jacobs gown the pop star is wearing. Behind the scenes after the break.

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Photo courtesy of Vogue.