Runway highlights from Erin Fetherston atMercedes-Benz Fashion Week New York, Spring 2009. Extensive coverage of runway shows, including BCBG, Rock & Republic, Miss Sixty, Diane von Furstenberg, Carolina Herrera, Betsey Johnson, Badgley Mischka, Diesel, Michael Kors, Anna Sui, Charlotte Ronson, Vera Wang and Zac Posen.