Despite being known for her glamorous style, the reality TV star - who gave birth to her first child last month - admits her rapper boyfriend favours a more natural look.
Kim, 32, said: ''He loves the dress up aspect, but he also likes me without make-up on.''
Meanwhile, her sister Kourtney, 29, admitted her husband Lamar Odom is a fan of a sexy red lip.
She joked: ''[He likes] lipstick, but he doesn't like to wear it second hand!''
Kim also shared her tips for faking razor-sharp cheek bones, revealing it's all down to crafty contouring.
She said: ''It's all about light and shadow; highlight your brow bones with a luminizer and very lightly enhance cheekbones with non-glittery bronzer.''
The Kardashian sisters - who have launched a new cosmetics line, Kardashian Beauty, available exclusively at Feelunique.com - haven't always looked so stylish and claim to have had their fair share of beauty disasters in the past.
Asked about their worst ever make-up moment, Kim confessed: ''Matching eye shadow to my hair accessories and clothes...''
Kourtney, 34, revealed: ''Too much make-up - pick a strong eye or a strong lip, not both!''
Several items from the Kardashian Beauty range sold out in a matter of hours on Monday night (15.07.13) on feelunique.com, with fans already on waiting lists to receive the Au Naturel Lip Kit Khloe Ultra Nude - In the Flesh and the Joystick Lip Stick Pen - Shocking Pink.
Jackson Millarker will star in episode ‘A Stereotypical Day’ set to air in the US on Wednesday evening.
The cast had teased something big was coming and all was revealed on Monday night.
The rapper teams up with Apple Music on his latest project.
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