Shall we disco? Fashion Week embraces '70s muse

The Badgley Mischka spring 2011 collection is shown in New York during Fashion Week, Tuesday, Sept. 14, 2010. (AP Photo/Stuart Ramson)

The Badgley Mischka spring 2011 collection is shown in New York during Fashion Week, Tuesday, Sept. 14, 2010. (AP Photo/Stuart Ramson)

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