Here's a classic long a-line prom dress 4520 that hints of seductiveness. From Dancing Queen, this long sweetheart formal dress has beaded embroidery on the sheer corset-style bodice that wraps around to the lace-up back. In misses and some plus sizes, this exquisite long evening gown has a gleaming long skirt with a thigh-high side slit that flows to the floor in a figure-flattering a-line shape. Get ready to be the center of attention in this long a-line prom dress that is surprisingly affordable at under $150.