Here's a pleated corset prom dress that's a beautiful blend of sweet and sassy. Pinched together above a plunging illusion keyhole cut out, the sweetheart neckline looks like a lovely bow at the top of this long prom dress. Figure-flattering pleating follows the curves along the top of the floor-length skirt of this tight prom dress above the bold side slit. For a look that's all sugar and spice, wear this illusion corset prom dress to your next formal event.