One-Shoulder Long Formal Gown: Dave & Johnny A8568Sleek and so feminine, this one shoulder long formal dress A8568 by Dave and Johnny is one you won't want to miss out on. With a ruffled asymmetrical neckline with one ruffled short sleeve, this long designer dress is a stand out choice for prom, galas, and other formal events. With a princess cut bodice and a hip skimming long skirt that opens in a thigh high side slit, this one shoulder long formal dress is red carpet ready for your big night.