Star Studded: Best Parties This Week

New Yorkers are still counting down to the season’s first snowfall, but Katy Perry and Allison Williams lived their ultimate teenage dream at the 12th annual UNICEF Snowflake Ball on Tuesday at Cipriani Wall Street. Dressed in what could have passed as high-fashion prom dresses (Perry in Marchesa, Williams in Carolina Herrera), the dynamite pair hugged it out inside of the ball, where they were also joined by Perry’s love interest, Orlando Bloom, and Hillary Clinton, who presented the singer with the Humanitarian Award.

At the 2016 IFP Gotham Independent Film Awards, Katie Holmes turned to Zac Posen for a gorgeous rose-print dress, while Margot Robbie radiated in a white, deep-V Calvin Klein dress. Emma Stone continued to live in La La Land as she promoted her latest flick inside Manhattan hotspot Le Cou Cou with friends Aziz Ansari and Quest Love.

Of course, our fabulous January cover star, Sarah Jessica Parker, made an impressive outing, too, but not in New York. Parker headed to the 305 where she participated in Art Basel Miami festivities while rocking a colorful floral dress.

RELATED: Katy Perry's Beauty Transformation

Scroll through to see more stars at the hottest parties this week.

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Allison Williams and Orlando Bloom

Kevin Mazur/Getty

at the 12th annual UNICEF Snowflake Ball. 

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MARGOT ROBBIE

Eugene Gologursky/Getty

in Calvin Klein at the 12th annual UNICEF Snowflake Ball. 

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KATY PERRY

Noam Galai/WireImage

in Marchesa at the 12th annual UNICEF Snowflake Ball. 

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Pamela Fiori, Hillary Clinton, Katy Perry, and Caryl Stern 

Jason Kempin/Getty

presenting Perry with the Humanitarian Award at the 12th annual UNICEF Snowflake Ball. 

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AMY ADAMS AND CATE BLANCHETT

at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards.

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NATALIE PORTMAN AND GRETA GERWIG

Matthew Eisman/Getty

at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards.

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KATIE HOLMES

Raymond Hall/GC Images

in Zac Posen at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards.

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Proenza Schouler's Lazaro Hernandez Jack McCollough

Benjamin Lozovsky/BFA/REX/Shutterstock

at the Phoenix House Fashion Award dinner, where they were honored.

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KATE BECKINSALE

Victor Chavez/WireImage

in Vionnet at the Underworld Blood Wars press conference in Mexico City.

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Emma Stone

Kristina Bumphrey/StarPix

at a Bulleit Bourbon-hosted luncheon at Le Coucou in celebration of La La Land.

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Emma Stone, Aziz Ansari, and Quest Love

Kristina Bumphrey/StarPix

at a Bulleit Bourbon-hosted luncheon at Le Coucou in celebration of La La Land.

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amy adams and christina hendricks

Paul Bruinooge/Patrick McMullan/Getty

at a screening of Arrivals. 

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Rihanna

Theo Wargo/Getty

at 2016 Footwear News Achievement Awards, where she was honored for designing the Fenty x Puma Shoe of the Year. 

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ZENDAYA

Gary Gershoff/WireImage

in Michael Kors Collection at the 2016 Footwear News Achievement Awards.

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Kate Hudson, Gwyneth Paltrow, and Demi Moore

Courtesy La Perla/BFA

at the opening of Paltrow's Goop Gift pop-up shop in Los Angeles.

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Gwyneth Paltrow

Courtesy La Perla/BFA

at the opening of Paltrow's Goop Gift pop-up shop in Los Angeles.

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Rumer Willis and Demi Moore

Courtesy La Perla/BFA

at the opening of Paltrow's Goop Gift pop-up shop in Los Angeles.

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Dev Patel

Courtesy Burberry

at the Burberry and The Weinstein Company's Burberry Beverly Hills cocktail in celebration of the actor's performance in Lion.

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SARAH JESSICA PARKER 

Frazer Harrison/Getty

at the opening of  L'Eden by Perrier-Jouët in Miami.

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PETRA NEMCOVA

Mike Coppola/Getty

at the opening of  L'Eden by Perrier-Jouët in Miami.

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MARTHA HUNT

Frazer Harrison/Getty

at the opening of  L'Eden by Perrier-Jouët in Miami.

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