From Kate Middleton to Miley Cyrus, the Best & Worst Dressed (PHOTOS)

Marion Cottilard stuns in Dior, Lady Gaga dons a cheese wedge head, and Miss Wrecking Ball cleans up in Marc Jacobs. See the fashion highs and lows of the week.

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Marion Cotillard practically sleeps in Dior, but her appearance at the Elle Women in Hollywood Awards in Los Angeles on Monday night brought out an exceptionally good dress: a silver, strapless Dior number with matching heels.

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The W editor looked chic (and warm) at a Prada Journal event in New York in a belted Prada gingham coat and bright purple Alexandre Birman heels.

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Lake Bell has been on a roll recently—and her look at the Elle Women in Hollywood Awards in L.A. on Monday was no exception. Bell wore a black Altuzarra stress with a zipper up one side, Gianvito Rossi black-and-white pumps, and carried a Reece Hudson clutch.

Jon Kopaloff/FilmMagic

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Sometimes keeping it simple really is best. Michelle Williams looked lovely in Louis Vuitton at the Whitney Gala and Studio Party in New York on Wednesday night.

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After weeks on our worst dressed list, Miley moonlighted on the other side—in a perfectly ladylike sparkling aqua Fall 2013 Marc Jacobs dress at the 30^th annual Fashion Group International Night of the Stars on Tuesday in New York.

Monica Schipper/FilmMagic

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At the CFDA/ Vogue Fashion Fund Event at the Chateau Marmont this week, Diane Kruger looked radiant in a white Cushnie Et Ochs dress and Celine shoes.

Jeff Vespa/WireImage

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The youngest person ever to grace our best dressed list, 3-month-old Prince George in his christening gown, took the cake this week. Not far behind was his mum, who looked stunning in an Alexander McQueen ruffled suit and a Jane Taylor fascinator.

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Interesting silhouette or ball of string? Naomie Harris looked unique in a Calvin Klein dress at Elle’s Women in Hollywood Awards in L.A. on Monday night.

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A giant block of furry cheese with eyeholes—otherwise known as Lady Gaga—appeared in Berlin on Thursday to promote her upcoming album, ARTPOP.

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The actress arrived at the Elle Awards in a bizarre white tennis skirt and crop top.

Jon Kopaloff/FilmMagic

From Kate Middleton to Miley Cyrus, the Best & Worst Dressed (PHOTOS)

From Prince George’s record to Lady Gaga’s cheese wedge head, see fashion’s high and lows this week.

The Fashion Beast Team