A gaggle of stylish celebs and fashion insiders have flocked to Paris for Spring '11 Couture Fashion Week — and a few of them were lucky enough to be invited to Vogue and Gucci's dinner party. Model Laetitia Casta and Carine Roitfeld both opted for long, black Gucci stunners. Laetitia's is one-shouldered with a high neck, while Carine's has a sexy cutout in the back. Both look fabulous in their looks, but who wins this battle?
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