Watch Daphne Guinness Change Into an Alexander McQueen Gown in the Barneys Windows

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Before last night's Costume Institute Gala Benefit, while most invitees were primping at home, Daphne Guinness donned an Alexander McQueen feathered number in the iconic Barneys windows on 61st Street and Madison Ave. A crowd of fans gathered as she dramatically dressed before their very eyes. See the spectacle in our video here.