The Rosalie Top by Significant Other is a structured yet feminine essential, featuring a fitted bustier silhouette, peplum hem, seam detailing, and an exposed back metal zipper. The Rosalie Top by Significant Other is a structured yet feminine essential, featuring a fitted bustier silhouette, peplum hem, seam detailing, and an exposed back metal zipper. Founded in Australia, Significant Other was created as a beach-to-bar brand for the laidback, fun-loving, and always on-trend modern woman.