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Here comes the rare season in which cocktail dresses can actually be worn! From your best friend's annual holiday shindig to your company work dinner or a trip to the ballet, 'tis the time for fancy dressing. No pressure!

To help inspire your shopping, we gathered our favorite festive looks from 40 of the most fashionable stars. So whether you're a Miranda Kerr or an Alexa Chung, looking for something sexy or charming, subtle or striking, check out these foolproof looks to suit every style.