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Who: Carey Mulligan
Where: The ASMALLWORLD gala dinner for the Alzheimer Society at the Gstaad Palace Hotel in Switzerland.
When: December 15
What: A silver and black tulle dress from Valentino fall 2012.
Why: The geometric lines of this delicate silver overlay keep the dress black tie-ready, not tinsel town. Sleek pulled-back hair and minimal makeup are the perfect, umm, foil.
Photo: TheImageGate/Getty Images