Sculptural and Sexy: Betsy & Adam One-Shoulder Sheath Cocktail Dress This Betsy & Adam One-Shoulder Sheath Cocktail Dress ($169) makes an alluring choice for an evening party. With the slashed neckline and one-shoulder silhouette, it has an architectural design. Image Source: nordstrom.com Betsy & Adam One-Shoulder Sheath Cocktail Dress $169 from nordstrom.com Buy Now