Kim's make-up artist Mario Dedivanovic holds beauty masterclasses in America to teach fans the tricks of the trade, including his famous contouring technique.
But while Mario is usually assisted by a model, this time his model cancelled... and Kim flew in especially to take her place!
Taking to Instagram to post a before and after picture of his muse, Mario wrote: "I taught the class our signature look. What a treat this was. #epic #grateful.
"She took a red eye flight last minute to be there for me after my model cancelled last minute. And she gave all the artists amazing advice about all the things that are important when it comes to client/artist relationships.
"I'm still in shock. Thank you thank you thank you. (Ps each photo was taken with different lighting and cameras)."
While Kim looks amazing in her make-up photo (obviously), we reckon she looks pretty incredible in her before pic too! Some girls have all the luck...
Mario perfected Kim's complexion with a flawless foundation before creating her trademark sculpted look with a sweep of contour powder under her cheekbones, paired with a paler hue to highlight under her eyes and down the centre of her nose.
It looks like the make-up maestro swept a shimmery silver eyeshadow across her lids, teamed with a thick flick of feline liner plus a few false lashes to give a flirty flutter.
And to finish her look, Mario filled in any sparse sections of her brows before slicking her pout her fave nude glossy hue. Stunning!
While we don't know the exact products Mario used to create this look, we do know a few items Kim can't get enough of.
Keeping Up With The Kardashians star Kim gets her brows groomed at Anastasia Beverly Hills salon and likes to use Dipbrow Pomade, £15, a tinted gel-mousse formula, to fill in any gaps.
As for complexion products, Mario's previously gushed about his love for NARS Blusher in Orgasm, £22.50, a healthy pink hue boasting a hint of gold shimmer, and Ben Nye Luxury Banana Powder, £11.95, a mattifying powder that helps to set make-up.
And of course Kim and her sisters have their own make-up line, Kardashian Beauty, which includes everything from lash-plumping mascaras to silky lipglosses, to pretty nail lacquers.
Kim's also a fan of Urban Decay and L'Oréal Paris cosmetics - she wore Urban Decay Naked Skin Liquid Foundation, £27, and L'Oréal Paris Infallible Eyeshadow in Sahara Treasure, £6.99, on her wedding day, teamed with her Kardashian Beauty Honey Stick Lipgloss in Natural Honey, £8.95.
What do you think of Kim's before and after photos? Let us know by commenting below as the best comment across the site each week wins £50!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!
Got an iPad or iPhone? Reveal Mag is specially designed to fit!