Sleek and sensual, this long sweetheart prom dress from Cinderella Couture is designed to make a flirty fashion statement. With a sheer corset-style bodice that wraps around to the back, this long formal dress gets a sexy vibe, while thin shoulder straps lead to the sheer corset back. The long special-occasion dress has a long a-line skirt that opens in a side slit before ending at the floor in a small train. An impressive choice for prom, galas, and other formal events, this long sweetheart prom dress is surprisingly affordable at under $200.