Yesterday I showed you how to get Lucy's hot-pink Alexander McQueen Look For Less, and today she's up for a style battle. The dress she wore for her Late Show appearance earlier this week is one and the same as the black McQueen dress Sienna Miller wore for the premiere of her film Interview back in October. Lucy went more bold with brighter color and leather gloves, while Sienna played it sleek and chic with a contrasting clutch and chandelier earrings. Who wins?!