The KKW Beauty founder, who just released a line of concealers, told the podcast hosts she needs to "go heavy" on the under-eye products for her "dark circles" otherwise she looks "tired."
The topic of Kim's beauty flaw came up when she was asked about the one makeup product that changed her life. "It was concealer and the way Mario put concealer under my eyes was a big change for me," the 37-year-old mogul said.
"I have really dark circles," Kim continued. "Mario was like, 'we are going heavy and we are going to contour and conceal,' and he taught me everything I know."
- Nicole Brown's Sister Slams Kim Kardashian After Making 'Distasteful' O.J. Simpson Jokes On 'Saturday Night Live'
- Kim Kardashian & Kanye West Get Lunch As The Reality Star Is Losing Patience With Rapper Dragging His Feet On Divorce
- Kim Kardashian Shares Clip Of Estranged Hubby Kanye West Ascending Into The Air At 'Donda' Listening Event
"I was so shocked and I fell in love," she added. "I am a heavy makeup kind of girl." She's now so into makeup that she's got a hair and makeup clause in her will.
When Kim goes makeup-free, she looks more "tired," she said, and she doesn't want that effect when she's getting glammed up. "It's an either or," she said.
What do you think about Kim's biggest beauty flaw? Let us know in the comments!