"I love a tailored dress," says Marjorie Gubelmann, founder of the home-fragrance company Vie Luxe. "You just zip it up and go—it's practical." Not to mention body enhancing: "I'm not a size 4, and I think a dress can hide a multitude of sins. Narciso's silhouettes are extremely flattering." This sleeveless black sheath ($250) is distinguished not only by a killer shape but by Rodriguez's gift for color-blocking—a triangle of white on one side casts an attractive light on the face.
Necklace, R.J. Graziano. Cuff, Cara Croninger.