Now, we don't like pitting sisters against each other — even when they frock up to the same event (in this case, the Harper's Bazaar Women of the Year Awards in London) in similar ensembles. We think that Cara and Poppy Delevingne's in-sync 'fits speak volumes about the after-dark appeal of molten metallics, in particular — gold. The British beauties opted for same-but-different gold dresses; Cara in an all over sequinned Burberry number — which she toughened up with biker boots and a solid leather belt, and Poppy in a lingerie-inspired, metallic-skirted gown spliced with lace. Combined with black, this modern take on metallics will become the basis of our party season repertoire. To get you on the right track, we've found 10 killer party frocks that channel the stylish sisters' gold-star style.