Halsey flashes her bra while Alessandra Ambrosio lets loose on the DJ decks at amfAR afterparty

The stars turned out for a good cause on Thursday as they attended the annual amfAR Gala Cannes to raise money for AIDS and HIV research and awareness.

And after attending the swanky soiree, the celebrities seemed keen to let their hair down as they attended Johnny Depp and Richie Akiva’s afterparty. 

Leading the stars was Halsey, who looked sensational in a sheer lace top that flashed her toned abs and black bra. 

The singer, 28, teamed the garment with a glittering gold skirt while sheer socks and heels boosted her modelesque frame. 

It was a more vampish look than her gala outfit, where she opted for a sleeveless, flowing pink gown that was made of sheer material. 

Dressed to impress: Halsey flashed her bra in a sheer top as she led stars letting their hair down at Johnny Depp and Richie Akiva’s amfAR afterparty in Cannes on Thursday

Loving life: Alessandra Ambrosio ensured all eyes would be on her as she strutted up to the DJ deck and commanded the microphone at the party 

Another star who’d opted for a quick change was Alessandra Ambrosio, who was modelling a sequinned silver dress that showed off her toned figure. 

At the party, she ensured all eyes would be on her as she strutted up to the DJ deck and commanded the microphone.  

Earlier in the day, the model looked nothing short of incredible in a perilously plunging silver gown as she attended the gala. 

Alessandra stunned in the daring silver gown with racy beading that showed off her ample cleavage.

Despite being the host of the afterparty, 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 served as host for what is the hottest party during the annual Cannes Film Festival, and 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 spirits brand.

Clase Azul is Mexico’s first luxury spirits brand and creators of Clase Azul Reposado that celebrity guests sipped on at the party.

Mixing things up: Halsey’s sheer ensemble was more vampish look than her gala outfit, where she opted for a sleeveless, flowing pink gown that was made of sheer material

Three’s company: Halsey teamed her sheer top with a glittering gold skirt and sheer socks and heels that boosted her modelesque frame as she posed with Starino and Lucien Laviscount

Lovely ladies: Halsey and Alessandra posed for snaps together at the glamorous bash 

But first, selfie time! The pair joined their friends to snap pictures and remember the moment

Fun times: Alessandra couldn’t contain herself as she ran up to perform on the decks 

Gorgeous: Earlier in the day, the model looked nothing short of incredible in a perilously plunging silver gown as she attended the gala

Dressed to impress: Cindy Bruna looked incredible in a plunging sequinned jumpsuit while Georgia Fowler dazzled in a scarlet mini dress with a sexy cut out 

Wow! Leila Depina left little to the imagination as she wore a necklace top that barely protected her modesty 

Striking: Cindy Kimberly looked sensational in a champagne cutaway gown that flashed her abs while Mary Leest dazzled in a shimmering dress adorned with pleats 

Abs-olutely fabulous: Teyana Taylor showcased her washboard abs in a tiny black crop top and a fishtail skirt and after partying up a storm she removed her heels 

The swanky amfAR gala also included a fashion show curated by Carine Roitfeld, and a fund-raising auction by Simon de Pury.

Included in the auction were Cecily Brown’s latest work – created specially for amfAR – and a signed 2016 Damien Hirst artwork of Leonardo DiCaprio.

Amongst amfAR Gala Cannes’ co-chairs are 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 nonprofit organizations dedicated to the support of AIDS research, HIV prevention, treatment education, and advocacy.

In April 1983, Dr. Mathilde Krim and Dr. Joseph Sonnabend, along with Michael Callen and a few others in New York City, founded the AIDS Medical Foundation (AMF).

It was the first private organization in the world dedicated to raising funds to support scientific and medical research on AIDS. Its first research grants were awarded in 1984.

In September 1985, amfAR was formed through the unification of AMF with the like-minded National AIDS Research Foundation, which had been incorporated in California in August 1985.

Since then, amfAR has invested nearly $617 million in its programs and has awarded more than 3,500 grants to research teams worldwide.

amfAR Gala Cannes has raised a cumulative total of more than $245 million for amfAR’s lifesaving AIDS research.

Sassy in silver: Maye Musk looked fantastic in a sequinned silver trouser suit that complemented her peroxide blonde hairdo 

Here come the boys: Jordan Barrett looked dapper in a striped blazer while Adam Lambert opted for a sheer black blouse paired with silver trousers 

Three’s company: Ikram Abdi, Fanny Bourdette Donon and Rose Bertram cosied up snaps

Wild thing! Ellen von Unwerth looked incredible in a leopard print gown layered over black satin shorts