At the start of an uncertain new century, the looks of 100 years ago have an undeniable appeal. So it isn’t surprising that tops, dresses and belts that resemble corsets from the Edwardian era were an important look for spring, often worn with ruffled pieces that suggest the petticoats of the time. Among the versions shown: La Perla’s long, boned top, Les Copains’ frothy, side-laced dress and Calvin Klein’s masculine-feminine mix in a corset over a tank and pants.