Best of 2009

Most Outrageous Faceoffs

From the dresses you can't believe were worn twice – to the stars you'd never imagine having the same taste! – see the most amazing match-ups of the year

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ANNE VS. MARIAH

Hathaway flaunted her figure in her second-skin Hervé Léger by Max Azria dress at NBC studios in N.Y.C., while Carey topped off her red-hot mini with a trench for her arrival at the Narita airport in Japan.