Strapless Sequin Prom Gown: Amelia Couture JQ1101Polished posh, this strapless long sequin mermaid prom dress by Amelia Couture is as dazzling as it is affordable. At under $200, this strapless long formal dress is a budget friendly choice with sequin designs from the sweetheart neckline to the hem. Thin bands lace up over the open back of this strapless long evening gown for a fitted look at prom, galas, and other formal events. A hip skimming long mermaid skirt ends in a train to complete the look