With beautiful floral embellishments, this long pastel prom ball gown is sure to kick up the wow factor. An old Hollywood style for prom, military balls, and other formal events, this plunging v-neck evening gown is a beautiful choice that is sure to stand out in a crowd. With a sheer corset-style bodice, this long a-line formal dress has thin shoulder straps that adjust over the open back, while the fully-lined long skirt has a floral-embroidered sheer overlay that opens in a side slit before reaching the floor. Simply gorgeous, this long pastel prom ball gown by Amelia Couture is surprisingly under $300.