Spring Fashion 2011Spring 2011 Fashion Trend: Trench dressThe mash-up of two pretty Hall of Fame trends—trench coats and sheath dresses—will be your favorite new Monday-through-Friday wardrobe item when spring arrives.Spring 2011 Fashion Trend: Sheer layerThe gauzy stuff was all over the Fashion Week runways. Our advice for wearing this trend in real life? Steer clear of the X-rated looks that