Celebrity Star Studded: Best Parties This Week By Jonathan Borge Jonathan Borge Instagram Twitter Jonathan Borge is a writer and editor living in New York City. His writing has appeared in Glamour, Refinery29, Forbes, and PAPER, among other publications. Plus, he's held staff positions at Marie Claire, InStyle, and OprahDaily.com. Currently, he's the Senior Entertainment Editor at Bustle Digital Group's Elite Daily, where he oversees digital covers, features and profiles, freelance essays, and strategy for the site's TV/Movies and Celebrity and Music sub-verticals.He primarily writes about pop culture and style, and has a passion for telling LGBTQ+ and Latinx stories. When he's not working, he's likely waiting for Lady Gaga to announce her next tour. InStyle's editorial guidelines Updated on December 2, 2016 @ 04:00PM Pin Share Tweet Email Trending Videos Photo: Frazer Harrison/Getty 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. 01 of 21 Allison Williams and Orlando Bloom Kevin Mazur/Getty at the 12th annual UNICEF Snowflake Ball. 02 of 21 MARGOT ROBBIE Eugene Gologursky/Getty in Calvin Klein at the 12th annual UNICEF Snowflake Ball. 03 of 21 KATY PERRY Noam Galai/WireImage in Marchesa at the 12th annual UNICEF Snowflake Ball. 04 of 21 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. 05 of 21 AMY ADAMS AND CATE BLANCHETT at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards. 06 of 21 NATALIE PORTMAN AND GRETA GERWIG Matthew Eisman/Getty at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards. 07 of 21 KATIE HOLMES Raymond Hall/GC Images in Zac Posen at the FIJI Water co-sponsored 2016 IFP Gotham Independent Film Awards. 08 of 21 Proenza Schouler's Lazaro Hernandez Jack McCollough Benjamin Lozovsky/BFA/REX/Shutterstock at the Phoenix House Fashion Award dinner, where they were honored. 09 of 21 KATE BECKINSALE Victor Chavez/WireImage in Vionnet at the Underworld Blood Wars press conference in Mexico City. 10 of 21 Emma Stone Kristina Bumphrey/StarPix at a Bulleit Bourbon-hosted luncheon at Le Coucou in celebration of La La Land. 11 of 21 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. 12 of 21 amy adams and christina hendricks Paul Bruinooge/Patrick McMullan/Getty at a screening of Arrivals. 13 of 21 Rihanna Theo Wargo/Getty at 2016 Footwear News Achievement Awards, where she was honored for designing the Fenty x Puma Shoe of the Year. 14 of 21 ZENDAYA Gary Gershoff/WireImage in Michael Kors Collection at the 2016 Footwear News Achievement Awards. 15 of 21 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. 16 of 21 Gwyneth Paltrow Courtesy La Perla/BFA at the opening of Paltrow's Goop Gift pop-up shop in Los Angeles. 17 of 21 Rumer Willis and Demi Moore Courtesy La Perla/BFA at the opening of Paltrow's Goop Gift pop-up shop in Los Angeles. 18 of 21 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. 19 of 21 SARAH JESSICA PARKER Frazer Harrison/Getty at the opening of L'Eden by Perrier-Jouët in Miami. 20 of 21 PETRA NEMCOVA Mike Coppola/Getty at the opening of L'Eden by Perrier-Jouët in Miami. 21 of 21 MARTHA HUNT Frazer Harrison/Getty at the opening of L'Eden by Perrier-Jouët in Miami.