(7 of 12) Fashion Week TrendsFrom Marc Jacobs to Zac Posen to Diane von Furstenberg, all the top designers unveiled their spring collections at New York Fashion Week earlier this month. And from all the shows, there seemed to be some common threads. Here, we highlight 12 of hottest trends seen on the runway. Cinch Belts Wide belts paired with high-waisted skirts, pants, and shorts were found in many of the designer lines. They were also used to define high waists in floor-length gowns and casual spring dresses.