Homecoming/Formal Strapless Dress

Strapless dress (the thin straps seen in the pictures are for hanging purposes. Black top with a purple ribbon with a bow in the front that goes around the waist and ties in the back. Has a zipper in the back. The bottom is white with black and gray floral designs. Worn at most 3 times. Bought from store and is unaltered so it fits as if you walked into the store and bought this size. Last image shows it on. Could be used for a costume!!