She told the outlet that her biggest beauty pet peeve was too much makeup.
She explained, "Too much makeup on a pretty person. On a pretty girl. I mean, everyone's pretty, so I guess just too much makeup in general. But like, sometimes I'll just see a really beautiful girl and she'll have SO much makeup on. And you're like Why? You're so pretty!"
She added that some people look better in makeup than others, but that it is not for her.
She continued, "I mean, I have five sisters who take makeup really well. But like I said, they're very beautiful, and sometimes I see them with so much makeup and I'm like Why? You don't need it. My sisters and I will always be on different pages with makeup. Though I have learned from them to experiment more and get funky sometimes."
Kendall looks incredible with or without makeup partly because she takes such excellent care of her skin.
One of her biggest skin concerns is acne. She explained during the interview: "Acne is definitely one of them, and I use Proactiv."
She also makes sure to moisturize her skin, which is especially important since acne treatments typically dry skin out. Kendall adds, "Then I feel like everyone hates dry skin. I hate to be dry. So a really good moisturizer, or even something more hardcore if you need it: Aquaphor is very multipurpose, so I'll use that if I have a patch."
Jenner's makeup free video is proof that hard work (and good skincare) pays off.