Whether downtown chunky or uptown sleek, 1990s-influenced mules cropped up as key runway trend during the New York collections. Victoria Beckham's version was clean and slim to complement her sportif collection. At Nonoo, Manolo Blahnik created a dainty demi-heel version. Flat mules and slipper styles were also a fresh variation of the trend, as seen at Helmut Lang. For more, click through the slideshow.