Poppy Delevingne stepped out in style for Chanel's Little Black Jacket exhibition in London last night. The newly engaged style setter hit the scene in a metallic, sheer-paneled mini dress that not only showcased her perfect pair of stems, but also managed to draw attention away from her new bling. Simultaneously stealing the show was Poppy's choice of headwear for the night — she sported a pretty lace cat-ear headband that popped perfectly against her blond hair and gave her otherwise sexy look a fun, youthful vibe. We're fans of this cheeky headpiece and think it provides a healthy dose of Halloween inspiration, too. What do you think of Poppy's cat ears?