Socialite-turned-fashion-designer Nicole Richie was a vision in black in a sleek Osman gown for the 2011 Unicef Ball in California a couple of nights ago. The stunning floor-sweeping dress was comprised of a leather upper and slim-fit viscose skirting. The mum of two appeared distinctly ‘un-mumsy’ as the dress boasted a rather revealing cut-out waist in turn highlighting Ms. Richie’s petite frame. Team LBD are loving the subtle self-promotion as the fashion designer proudly sported a gorgeous pony-hair box clutch from her very own House of Harlow label. This woman knows how to accessorise! The modern column shape and cut of the dress is carefully softened with Ms. Richie’s relaxed up-do and elegant chandelier earrings and the darkly kohl-rimmed eyes inject glamour into the outfit. To recreate Nicole’s fun but sassy styling, browse through some of our LBD favourites: [affiliate category_id=257 per_page=3 show_pagination=false]