But it seems Kim Kardashian has now let down her guard as she preened and perfected herself in full view of the public ahead of her appearance on the red carpet last night.
The 31-year-old stunned when she showed up to the amfAR gala with a classic, Old Hollywood style look in a canary yellow gown to the Cinema Against AIDS event at the Hotel du Cap.
Last minute preening: Kim touches up her foundation as she takes a boat to the amfAR galaBut instead of finishing off her look behind closed doors to give the air of perfection, Kim instead flossed and picked her nails as she retouched herself on a yacht.
The reality TV star was seen reapplying her foundation, fiddling with her nails and even flossing before she left for the public event.
And she obviously wanted to look her best as she played with her bracelet and kept on checking herself in the mirror.
Flossing: Kim appears to be flossing her teeth as she rides towards the hotel
Fans have noted a definite change in Kim's red carpet style since she started dating Kanye West.
Perfecting her look: Kim couldn't help but play around with her bangle in full view of everyone
Helping hand: Kim even got an assistant to help her with her shoes as she finally headed to the amfAR gala
Miss Kardashian continued her glamorous theme with Forties' style curls and bright red lipstick.
Retro glamour: Kim Kardashian stood out in a canary yellow gown at the amfAR Cinema Against AIDS gala in CannesPerhaps the reason behind her classic makeover was boyfriend Kanye's absence. The pair have been glued to each others sides during their stay in both London and Cannes but her was absent from the amfAR gala.
The rapper even flew straight to Cannes from his last show at the London O2 arena, so eager he was to not miss a night with Kim, after she flew out earlier in the day.
The ladies, who became friends after Kim appeared on Project Runway last year, have been spotted gossiping at a number of showbiz parties this week in Cannes, and even enjoyed lunch together aboard a boat a few hours before the amfAR party.
The annual Cinema Against AIDS benefit raises money for AIDS research.
Glamorous: Kim borrowed swapped her recent sexy image for something a little more classic for the star-studded gala
Babes in blue: Sports Illustrated model Kate Upton (left) in Louis Vuitton and actress Nina Dobrev in a glittering Elie Saab creation
Pretty in pink: English actress Joely Richardson (left) and American star Rose McGowan in an Atelier Versace gown
Her over-the-top emerald green earrings and cocktail ring added a pop of colour.
Irina, with her hair pulled back in a bun, pouted and blew kisses for the cameras.
Glamour: Australian singer Kylie Minogue wore a plunging red dress (left), while Czech supermodel Karolina Kurkova wore a stunning gold creation
All white on the night: Janet Jackson looked sexy in a white peek-a-boo halterneck gown, while British model Lily Donaldson wore a splash of yellow in her white dress
The German beauty wore her blonde locks in a messed-up bun and wore dramatic black eye make-up.
Coupled up: German actress Diane Kruger with boyfriend Joshua Jackson (left) and former tennis star Boris Becker and his wife Lilly
Rich girls: Socialites Tamara Ecclestone (left) - in a grey mullet dress - and Paris Hilton in flowing white creation
Also in attendance was Tara Reid, who had cleaned herself up after a few messy nights out this week and wore a embroidered grey dress.
Wild thing: Roman Abramovich's girlfriend Dasha Zhukova (left) wore a chic lacy dress, while Brazilian model Ana Beatriz Barros flashed the flesh in Roberto Cavalli
Looking just peachy: Russian model Irina Shayk in a stunning peach creation (left), while Swedish model Victoria Silvstedt wore an asymmetrical numberAlec Baldwin was another A-lister at the event, looking dapper in a suit and bow tie with girlfriend Hilaria Thomas by his side in a white strapless gown.
French Vogue editor Carine Roitfeld posed with amfAR chairman and designer Kenneth Cole.
The annual charity event, the hottest ticket of the festival, is held to raise money for AIDS research. As well as a performance by Jessie J, Carine Roitfeld is hosting a fashion presentation.
Back to black: (L-R) Italian actress Asia Argento, American film star Michelle Rodriguez and Czech supermodel Eva Herzigova
How much for Harvey? Kruger joins German designer Karl Lagerfeld and Harvey Weinstein on-stage during the charity auction
Karaoke? Karolina Kurkova and Antonia Banderas take to the stage
Boop boop be boop: Joely takes bids on a photo of Marilyn Monroe