Eschew traditional cocktail dressing in favor of Rebecca Vallance's dramatic Betty jumpsuit, taken from the Australian label's Resort '19 collection. This strapless style has been crafted with a romantic lace-trimmed bodice and subtly flared pants. The striking black silhouette is completed with an oversized bow at the waist. Choose a pair of statement earrings and sleek pointed-toe pumps to complete your look with after-dark flair.