Looks like Kate Middleton is a fan of Gossip Girl, or in the very least a fan of the wardrobe of one Blair Waldorf. 'Member the ep' where B gets engaged to her French Prince? Or more importantly, remember that gorgeous blush embellished frock that Leighton Meester was wearing? It's the very same that real life Princess (ok, ok, Duchess) Catherine Middleton wore last night to the Ark Dinner at Kensington Palace. The tulle-sleeved, sequinned skirted gown is an essay in feminine black tie dressing, and we think both brunettes look equally gorgeous in this Jenny Packham design. Having both Kate and Leighton as ambassadors is a huge coup for the British designer, already known for her beautiful red carpet and bridal designs. We're betting that Packham will be doing a roaring trade in pale pink, princess dresses after today!