Boasting a high neckline, Sharon Stone’s dress appeared demure and simple from the front.
But the 55-year-old star ensured she stole the limelight on the Cannes red carpet by turning around to reveal a gold snake trim running down her back.
It was the second time this week that the actress has shown she has lost none of her sex appeal.
She gives good back: Sharon modelled the Cavalli gown just as well from the back as she did from the front
Enough to make you Sliver: Sharon showed off her most famous feature thanks to her gold snake trim
Have you got a hot role for me: Sharon chatted to film producer Harvey Weinstein who was the co-host of the event alongside designer Kenneth Cole
At the premiere of Michael Douglas film Behind the Candelabra she wore a plunging blue gown.
Yesterday Miss Stone was attending a charity gala. One lot in the star-studded auction was a trip to space with Great Gatsby actor Leonardo DiCaprio.
The event managed to raise more than £20million to combat Aids.
Delight in white: Sharon Stone stunned in a pristine white Cavalli gown with gold snake detailing down the back at amFAR's Cinema Against AIDS 2013 charity event in Cannes on Thursday
Days of Thunder actress Nicole, who is a whole decade younger than the saucy blonde, looked comparatively dowdy in a black Marchesa dress with floral lace detailing.
But that did not stop the two sharing a kiss on the cheek as they took part in the thrilling bash, which raised sackfuls of gold for good causes.
Kylie Minogue and Olivia Palermo, meanwhile, were also in attendance and both sat next to each other in their own Roberto Cavalli gowns.
Cheek to cheek: Class act Nicole will have surely congratulated her older rival on her appearance as they kissed
Catching up: The pair worked hard together to raise plenty of money for AIDS charities
And while the female stars may have looked a million dollars, it was still way short of the amazing $32.3m raised at the star-studded event which was co-hosted by Harvey Weinstein and designer Kenneth Cole.
Even more impressively, this was more than double the $14.2m earned at last year's fundraiser.
What a flirt: The actress blew a kiss to the cameras as she made her way into the bash
Sexy and she knows it: Sharon flashes her famous smile for the cameras
The highlight auction lot was a trip to space with Hollywood actor Leonardo DiCaprio, which ended up being sold for $1.5 million.
Sharon said the winner would spend three days in training with DiCaprio in Mexico before blast-off.
She added: 'You don't get to go to outer space every day with a handsome movie star,' knowingly referencing her appearance in Mars alongside Arnold Schwarzenegger in 1990's Total Recall.
Game face: Sharon looked determined to attract lots of money from her high-rolling colleagues
Mistress of ceremonies: Sharon takes vigorous control of the auction
A contrast in styles: Sharon revelled in hamming it up while Ellie Goulding gave a focussed performance
The auction brochure for the gala held at the five-star Hotel du Cap-Eden-Roc in Antibes, France said Leo and the winning bidder will be among the first 1,000 people to leave the planet on the Virgin Galactic flight.
After winning, Monaco based Russian estate agent Vasily Klyukin, 37, said: 'I want to be a bit daring. I will have to give up smoking now for sure!'
The amfAR gala is the biggest fundraising event at the world's largest film festival, with the first ever benefit hosted by screen legend by Elizabeth Taylor.
She's a Dita Von Teese-r: It was like Basic Instinct 2 all over again as Sharon drew attention to this necklace
What a lucky guy: Sharon bent down and gave a lucky guest a smacker on the lips
What a double act: Charisma was at a premium when Jeremy Renner joined Nicole on stage to deliver a speech
The list of stars attending Thursday's event included also included Heidi Klum, Jessica Chastain, Dita Von Teese and Rosie Huntington-Whiteley.
The evening featured performances by gold-clad Shirley Bassey singing “Goldfinger” and British pop band Duran Duran.
All smiles: Leonardo DiCaprio appeared to find something intriguing as he watched the stage...
... perhaps it was the sight of Sharon surrounded by beautiful models including Alessandra Ambrosio (far left)
... but she still pretty much stole the show
Helping out: Janet Jackson got on the podium to announce some bidding
Shake a leg: Goldie Hawn danced around in a yellow dress with a fellow guest
She should be so lucky: Olivia Palermo may be a model but she was no match for stunning Kylie Minogue, with both opting to wear Roberto Cavalli frocks
Introducing the event, supermodel Heidi Klum, who was also dressed in Marchesa, said it raised more than 10 million euros ($12.9 million) a year for AIDS research.
Other auction items included tickets to Hollywood events, a Damien Hirst painting, an Annie Leibovitz family portrait, the chance to star in four movies and a private performance from Simon Le Bon and John Taylor of Duran Duran.
Bassey roused celebrity-revelers to dig deep into their pockets at the 20th amfAR gala in the Cap D'Antibes Thursday, helping to raise an estimated $25 million for AIDS research at the gold-themed auction event nearby the Cannes Film Festival.
Heidi hi: Model and reality personality Klum raised a glass to the audience when she took to the stage in her Marchesa gown
Red on red: Redhead Jessica Chastain was the essence of style as she addressed the room during the bash
The annual amfAR gala has for two decades attracted the film and fashion industries' rich and powerful — and this year was no exception, with movie mogul Harvey Weinstein — perhaps the Hollywood equivalent of the Midas touch — Leonardo DiCaprio, Jessica Chastain, Janet Jackson, Milla Jovovich and Goldie Hawn sitting side by side.
Stone, a pushy but charismatic host, is started to earn herself a legendary status presiding over the amfAR event, since the passing of its founder Elizabeth Taylor in 2011.
'I heard that somebody might go into outer space tonight. Maybe a rumor, maybe not,' said Weinstein before the auction.
Other items auctioned included an Andy Warhol lithograph of Taylor, a chance to have a family portrait taken by iconic photographer Annie Leibovitz, a week in fashion designer's Donna Karan's Caribbean hide-away and a shimmering 53-carat diamond necklace.
Lovely pair: The night may have been moving along at breakneck pace by Heidi and Jessica looked like they had been enjoying themselves
Hungry for attention: Model Rosie Huntington-Whiteley was more than happy to pose at the dinner table
The gala's excess remained just a front to one of the world's biggest fundraisers in the fight against AIDS, a disease that amfAR says still affect some 34 million people worldwide.
'Yes, you can think it's a silly little dinner, you can deride it as full of celebrities dressed up,' said Leibovitz, whose photo of Niagara Falls also sold at auction. 'But that's missing the point. 80 million dollars amfAR has raised since it began. That's the point. It has saved lives.'
Harvey Weinstein took the mic several times to praise the film industry's commitment to AIDS stressing that while two decades ago the illness was a "looming plague," now a cure might well be seen within "our lifetime."
Reminders of the serious nature of the event didn't manage to stop the fun, however.
Looking good: Melanie Brown aka Mel B attended Moncler, The After Party To Benefit amfAR during The 66th Annual Cannes Film Festival
Teaser: Footwear designer Christian Louboutin gave just the merest glimpse of his shoes as he posed with Kristen Scott Thomas
For the second time in amfAR's history, the event's penchant for excess translated rather well into a glimmering catwalk show — curated by stylist Carine Roitfeld.
It featured some 38 gold and black looks from designers such as Dior, Chanel, Lanvin and Prada worn by models such as Karlie Kloss Karolina Kurkova, Angela Lindvall and Alessandra Ambrosio Models who strutted on a catwalk between dining tables.
The standout dresses were a custom gold embroidered long sleeve gown courtesy of Valentino, and a custom gold pleated mini dress from Givenchy. All the dresses went under the hammer to a single bidder, selling in just a couple of minutes for a staggering $1.56 million.
Splashing the cash: Wealthy Amanda Cronin and Ella Krasner would not have been afraid to make bids
Though celebrities were in a generous mood, news that thieves outsmarted 80 security guards and made off with a necklace that creators say is worth a staggering 2 million euros ($2.6 million) — the second such jewelry heist during this year's Cannes Film Festival — had celebrities clinging more closely onto their jewels.
'Well yeah, I'm going to be watching how much champagne I drink,' said Jovovich, smiling.
'Because you never know somebody might come up and just shwoop, take it off.'
Thanks Cannes, it's been great: Sharon flies out of Nice airport on Friday
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