Shall we disco? Fashion Week embraces '70s muse

The Halston spring 2011 collection is modeled Monday, Sept. 13, 2010 during Fashion Week in New York. (AP Photo/Stephen Chernin)

The Halston spring 2011 collection is modeled Monday, Sept. 13, 2010 during Fashion Week in New York. (AP Photo/Stephen Chernin)

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