Inside the Whitney's Annual Art Party and More Fetes of the Week

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Where’s Ben Stiller when you need him? The Night at the Museum star was no where to be found across a series of late-night parties and galas that popped inside New York City’s most treasured institutions of art, like the Whitney Museum of American Art and the Guggenheim. Fashion’s rat pack , however, stepped out in droves all week long.

Karlie Kloss played co-host at the Whitney’s annual Art Party on Tuesday, when she was joined by—and wore a dress from—designer and fellow co-host Brandon Maxwell. For Kloss, the week didn’t spare any time for a Netflix-and-chill session. She also dazzled in a gilded, deep-V Michael Kors dress at L’Oréal Paris’s Women of Worth celebration in N.Y.C. alongside Eva Longoria and Blake Lively, and later turned to a LBD (a Dior version, nonetheless) at the Guggenheim’s International Gala 2016.

Poppy Delevingne and her stylish squad packed into New York's Museum of Modern Art on Tuesday for its Chanel-hosted Film Benefit, where the model honored Tom Hanks, who was on hand with wife Rita Wilson. Christy Turlington Burns, Alexa Chung, and Emma Watson were just a few talented stars that cut quite the classic figure in Chanel that evening.

RELATED: 10 of the Best Karlie Kloss Instagrams

Below, a look at more of the greatest parties from this week from N.Y.C. to L.A. and beyond.

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KARLIE KLOSS AND BRANDON MAXWELL

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at the Whitney's annual Art Party in New York City.

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ANNE HATHAWAY AND ADAM SHULMAN

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at the 2016 Guggenheim International Gala in N.Y.C. Hathaway in Dior.

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KATE BECKINSALE

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at the 2016 Guggenheim International Gala.

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BANKS

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at the 2016 Guggenheim International Gala.

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KARLIE KLOSS AND BANKS

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at the 2016 Guggeinheim International Gala.

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MARION COTILLARD

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in Dior at the 2016 Guggenheim International Gala Pre-Party in New York.

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ALEXA CHUNG

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at the 2016 Guggenheim International Gala Pre-Party.

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Christy Turlington Burns, Tom Hanks, and Rita Wilson

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at the Museum of Modern Art's Film Benefit in N.Y.C.

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EMMA WATSON

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in Kitx at the Museum of Modern Art's Film Benefit.

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Poppy Delevingne

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in Chanel at the Museum of Modern Art's Film Benefit.

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Katy Perry

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at the Capitol Records 75th anniversary celebration in Hollywood.

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MICHELLE MONAGHAN

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at the Rolex Awards for Enterprise 40th anniversary gala in Los Angeles.

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EVA LONGORIA, KARLIE KLOSS, AND BLAKE LIVELY

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at L'Oreal Paris' Women of Worth Celebration. Kloss in Michael Kors.

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JESSICA ALBA, JENNIFER GARNER, AND KATE HUDSON

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in Valentino, Roland Mouret, and J. Mendel at the Baby2Baby gala in Los Angeles.

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MATTHEW MCCONAUGHEY AND CHANNING TATUM

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at the Baby2Baby gala.

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CAMILA ALVES

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in Zuhair Murad at the Baby2Baby gala.

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TOM FORD AND AMY ADAMS

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at an L.A. screening of Nocturnal Animals.

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JANUARY JONES AND ISLA FISHER

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in Tom Ford at an L.A. screening of Nocturnal Animals.

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Dominic West and Sienna Miller

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at Burberry's Tale of Thomas Burberry celebration in SoHo.

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Victoria Sekrier and Laure Heriard Dubreuil

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at the opening of The Webster South Coast Plaza, Costa Mesa.

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Tori Praver

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at the opening of The Webster South Coast Plaza, Costa Mesa.

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Dree Hemingway

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at the opening of The Webster South Coast Plaza, Costa Mesa.

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Rebecca De Ravenel

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at the opening of The Webster South Coast Plaza, Costa Mesa.

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EMMA STONE

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at Variety and WWD's second annual StyleMakers Awards in West Hollywood.

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Nicole Kidman

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in Christopher Kane at the Governors Awards in Hollywood.

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Victoria Justice and Rebecca Minkoff

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at Minkoff's Los Angeles flagship to celebrate the brand's holiday collection with Smashbox cosmetics.

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The Art of the Party: How Stars Celebrated This Week's Best Fêtes

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KARLIE KLOSS AND BRANDON MAXWELL

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ANNE HATHAWAY AND ADAM SHULMAN

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KATE BECKINSALE

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BANKS

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KARLIE KLOSS AND BANKS

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MARION COTILLARD

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ALEXA CHUNG

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Christy Turlington Burns, Tom Hanks, and Rita Wilson

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EMMA WATSON

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Poppy Delevingne

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Katy Perry

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MICHELLE MONAGHAN

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EVA LONGORIA, KARLIE KLOSS, AND BLAKE LIVELY

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JESSICA ALBA, JENNIFER GARNER, AND KATE HUDSON

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MATTHEW MCCONAUGHEY AND CHANNING TATUM

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CAMILA ALVES

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TOM FORD AND AMY ADAMS

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JANUARY JONES AND ISLA FISHER

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Dominic West and Sienna Miller

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Victoria Sekrier and Laure Heriard Dubreuil

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Tori Praver

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Dree Hemingway

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Rebecca De Ravenel

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EMMA STONE

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Nicole Kidman

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Victoria Justice and Rebecca Minkoff