The stars showed up for a good cause on Thursday when they attended the annual amfAR Gala in Cannes to raise money for AIDS and HIV research and awareness.
And after attending the posh soiree, the celebs seemed happy to let their hair down as they attended Johnny Depp and Richie Akiva’s after party.
Leading the stars was Halsey, who looked sensational in a sheer lace top that flashed her toned abs and black bra.
The singer, 28, paired the garment with a shimmering gold skirt, while sheer socks and heels enhanced her model-like physique.
It was a more vampire look than her prom outfit where she opted for a sleeveless flowing pink dress made of sheer material.
Dressed to impress: Halsey flashed her bra in a sheer top as she led the stars letting their hair down at Johnny Depp and Richie Akiva’s amfAR after-party in Cannes on Thursday
Loving life: Alessandra Ambrosio made sure all eyes would be on her as she hit the DJ deck and rocked the mic at the party
Another star who opted for a quick change was Alessandra Ambrosio, who modeled a silver sequin dress that showed off her toned figure.
At the party, she made sure all eyes would be on her as she walked over to the DJ deck and operated the microphone.
Earlier in the day, the model looked nothing short of incredible in a dangerously plunging silver dress as she attended the gala.
Alessandra shone in the bold silver dress with sassy beading that showed off her ample cleavage.
Despite being the host of the after party, Johnny Depp was nowhere to be seen at the bash.
The star-studded amfAR Gala Cannes took place at the legendary Hotel Du Cap Eden Roc Cap D’Antibes.
Queen Latifah hosted what is the most popular party at the annual Cannes Film Festival, which raises millions of dollars for AIDS and HIV research and awareness.
Guests enjoyed musical performances from Halsey, Adam Lambert, Bebe Rexha and Gladys Knight, while sipping Clase Azul Gold and Reposado tequila from Mexico’s first luxury spirit brand.
Clase Azul is Mexico’s first luxury spirits brand and makers of Clase Azul Reposado that celebrity guests sipped at the party.
Mixing things up: Halsey’s sheer ensemble looked vampier than her prom outfit, where she opted for a sleeveless, flowing pink dress that was made of sheer material
Three’s company: Halsey paired her sheer top with a shimmering gold skirt and sheer socks and heels that boosted her model-like frame as she posed with Starino and Lucien Laviscount
Beautiful ladies: Halsey and Alessandra posed together for snaps at the glamorous bash
But first, selfie time! The pair joined their friends to take pictures and remember the moment
Fun times: Alessandra couldn’t contain herself as she ran upstairs to perform on the decks
Gorgeous: Earlier in the day, the model looked nothing short of incredible in a dangerously plunging silver dress as she attended the gala
Dressed to impress: Cindy Bruna looked fabulous in a plunging, sequined jumpsuit, while Georgia Fowler sparkled in a deep red mini dress with a sexy cutout
Wow! Leila Depina left little to the imagination as she wore a necklace that barely protected her modesty
Striking: Cindy Kimberly looked sensational in a champagne colored dress that flashed her abs, while Mary Leest sparkled in a shimmering dress adorned with pleats
Absolutely Fabulous: Teyana Taylor showed off her washboard abs in a little black crop top and a fishtail skirt and after going down a storm, she took off her heels
The posh amfAR gala also included a fashion show, curated by Carine Roitfeld, and a fundraising auction by Simon de Pury.
Included in the auction were Cecily Brown’s latest work – created especially for amfAR – and a 2016 signed Damien Hirst artwork by Leonardo DiCaprio.
AmfAR Gala Cannes co-chairs include Angela Bassett, Kate Beckinsale, Robert De Niro, Ethan Hawke, Scarlett Johansson, Milla Jovovich, Eva Longoria and Heidi Klum.
amfAR, The Foundation for AIDS Research, is one of the world’s leading non-profit organizations dedicated to supporting AIDS research, HIV prevention, treatment education, and advocacy.
In April 1983, Dr. Mathilde Krim and Dr. Joseph Sonnabend, along with Michael Callen and several others in New York City, founded the AIDS Medical Foundation (AMF).
It was the world’s first private organization dedicated to raising funds to support scientific and medical research on AIDS. In 1984 the first research grants were awarded.
In September 1985, amfAR was formed through AMF’s association with the like-minded National AIDS Research Foundation, which had been established in August 1985 in California.
Since then, amfAR has invested nearly $617 million in its programs and awarded more than 3,500 grants to research teams around the world.
amfAR Gala Cannes has raised more than $245 million in total for amfAR’s life-saving AIDS research.
Sassy in silver: Maye Musk looked fabulous in a silver sequined pantsuit that complemented her peroxide blonde hairstyle
Here come the boys: Jordan Barrett looked smart in a striped blazer while Adam Lambert opted for a sheer black blouse paired with silver trousers
The company of Three: Ikram Abdi, Fanny Bourdette Donon and Rose Bertram provided cozy shots
Wild Thing! Ellen von Unwerth looked fabulous in a leopard print dress layered over black satin shorts