Celebrity Celebrity Parties: May 16 to May 22, 2014 By InStyle Editors InStyle Editors Facebook Instagram Twitter Our editors and writers comprise decades of expertise across the beauty, fashion, lifestyle and wellness spaces in print and digital. We prioritize journalistic integrity, factual accuracy, and also having fun with every story we share. InStyle's editorial guidelines Updated on May 23, 2014 @ 02:28PM Pin Share Tweet Email Trending Videos Photo: Mark Davis/Getty Images for Sports Spectacular Celebrity Parties: May 16 to May 22, 2014 01 of 28 Heidi Klum and Justin Bieber Dave M. Benett/amfAR14/WireImage made for a stylish duo at amfAR's 21st Cinema Against AIDS Gala after party presented by Worldview, Bold Films, Bulgari, Merceds-Benz, and the Weinstein Company at the Hotel du Cap-Eden-Roc in Cap d'Antibes, France as part of the 2014 Cannes Film Festival. 02 of 28 Jessica Chastain Venturelli/WireImage/Courtesy of Moncler celebrated at the amFAR Cinema Against Aids After Party supported by Moncler as part of the 67th annual Cannes Film Festival in France. 03 of 28 Amanda Peet Gabriel Olsen/FilmMagic attended the Los Angeles premiere of Trust Me at the Egyptian Theatre in Hollywood. Peet stars in the film, which hits theaters June 6, 2014. 04 of 28 Lea Michele Jason Kempin/Getty Images signed copies of her new book Brunette Ambition (out now) for fans at Barnes & Noble in Los Angeles. 05 of 28 Bianca Balti, Karlie Kloss, Jane Fonda, Lara Stone and Barbara Palvin Traverso/L'Oreal/Getty Images made for a gorgeous group at amfAR's 21st Cinema Against AIDS Gala during the 2014 Cannes Film Festival, which raised a record breaking $35 million for research to fight HIV/AIDS and to help find a cure. The evening featured a celebrity filled live auction, an all red fashion show in tribute to Marilyn Monroe, and performances by Robin Thicke, Lana Del Rey, Aloe Blacc, and Andrea Bocelli. 06 of 28 Drew Barrymore and Bella Thorne Alberto E. Rodriguez/Getty Images were an adorable duo at the Los Angeles premiere of their film Blended, which also stars Adam Sandler. The comedy hits theaters May 23, 2014. 07 of 28 Heidi Klum, John Travolta, Kelly Preston and Rosario Dawson David M. Benett/Getty Images for Puerto Azul attended the welcome party for Puerto Azul Experience Night at Villa St George during the 2014 Cannes Film Festival in France. 08 of 28 Lea Michele and Jonathan Groff Splash News and Pictures showed off their tight bond during an event at Barnes & Noble Union Square in New York City which celebrated Michele's new book Brunette Ambition. 09 of 28 Kylie Minogue Wenn had a blast at the Magnum 25th Anniversary Party during the 67th Annual Cannes Film Festival. 10 of 28 Rosie Huntington-Whiteley and Roberto Cavalli Splash News stepped out for a star-studded party during the 2014 Cannes Film Festival hosted by Cavalli on his yacht. 11 of 28 Justin Bieber Luca Teuchmann/Getty Images also attended Roberto Cavalli's yacht party at the 67th Annual Cannes Film Festival in Cannes, France. 12 of 28 Rosie Huntington-Whiteley, Riley Keough and Cara Delevingne David M. Benett/Getty Images were a gorgeous trio at the de Grisogono 'Fatale In Cannes' party during the 67th Cannes Film Festival in France. 13 of 28 Dakota Fanning and Peter Sarsgaard Andrew H. Walker/WireImage attended the premiere of their film Night Moves in New York City. The thriller hits theaters May 30, 2014. 14 of 28 Alessandra Ambrosio and Adriana Lima Oleg Nikishin/Kommersant Photo via Getty Images) arrived at Chopard's 'Backstage Party' at the 67th Annual Cannes International Film Festival in France in model style. 15 of 28 Lorde and Ireland Baldwin Dimitrios Kambouris/Getty Images for MAC Cosmetics posed together at the launch party for MAC Cosmetics collaboration with the young singer in New York City, where she gave a special surprise performance. 16 of 28 Ashley Madekwe and Ahna O'Reilly Stefanie Keenan/Getty Images for Monique Lhuillier were dressed for spring at a Monique Lhuillier luncheon celebrating the designer's pre-fall 2014 collection at the designer's store in West Hollywood. 17 of 28 Kat Graham and Cottrell Guidry Chelsea Lauren/WireImage celebrated at the the 39th annual Gracie Awards, which recognize exemplary programming created for women, by women and about women in all facets of media and entertainment, as well as individuals who have made contributions to the industry. 18 of 28 Taylor Schilling AKM-GSI attended the 18th Annual Webby Awards in New York City, where she won the Best Actress award for her role in Orange Is The New Black. "I now have a Webby!" Schilling exclaimed during her acceptance speech. 19 of 28 Rosie Huntington-Whiteley Andreas Rentz/Getty Images celebrated Magnum Ice Cream's 25th anniversary in a chic Victoria Beckham frock at the 67th Annual Cannes Film Festival in France. 20 of 28 Imogen Poots and James McAvoy Stephen Lovekin/Getty Images came out for a screening of their film Filth in New York City, which was hosted by Magnolia Pictures and The Cinema Society at Landmark Sunshine Cinema. 21 of 28 Jim Parsons, Matt Bomer and Taylor Kitsch Jason LaVeris/FilmMagic were a fashionable trio at the premiere of HBO's The Normal Heart at The Writers Guild Theatre in Beverly Hills, California. They all star in the film, which premieres May 25, 2014 on HBO. 22 of 28 Diane Kruger Joe Stevens/Retna Ltd was her stylish self at the 73rd Annual Peabody Awards in New York City. 23 of 28 Rita Ora Ian Gavan/Getty Images for Belvedere Vodk kicked off the Cannes Film Festival's first weekend by delivering an energetic performance at Le Club Albane to celebrate Belvedere Vodka's return to Cannes for the seventh year. 24 of 28 Jessica Alba and Cash Warren Stefanie Keenan/Getty Images for Hammer Museum had a day of family fun at the Hammer Museum's fifth annual K.A.M.P. (Kids' Art Museum Project) event in Los Angeles, an exciting and interactive event imagined by artists to help cultivate the next generation of art lovers and patrons by providing extraordinary access and experiences for kids and their families. 25 of 28 Molly Sims and Rachel Zoe Joe Scarnici/Getty Images for FIJI Water hosted Super Saturday, a day-long fundraising event benefitting the Ovarian Cancer Research Fund at Barker Hangar in Santa Monica, California. 26 of 28 Miranda Cosgrove David Livingston/Getty Images attended the Nautica and LA Confidential's Oceana Beach House Party at the Marion Davies Guest House in Santa Monica, California. 27 of 28 Daniel Radcliffe, Bryan Cranston and Zack Braff Bruce Glikas/FilmMagic were all smiles at the 80th Annual Drama League Awards Ceremony and Luncheon in New York City. 28 of 28 Olivia Munn Mark Davis/Getty Images for Sports Spectacular was red hot at the 2014 Sports Spectacular Gala in Century City, California.