Dubbed Chelsea, this sexy tight long prom dress is for the girl who loves a bold look. Surprisingly affordable, at under $150, this backless long formal dress has a cowl neckline with barely-there thin shoulder straps that adjust over the open back for a flirty look with every turn at prom, galas, and school dances. In misses and some plus sizes, this long designer dress by Velvi has ruching that camouflages the tummy and ruffled trim on the top of the thigh-high side slit. Whether prom is approaching or you just want to impress at an upcoming formal, this tight long prom dress is ready for the spotlight.