Kylie Jenner's 'biggest beauty mistake' involves her famous lips

Kylie Jenner is famous for her filler-filled lips, but getting them to the right size is something the 18-year-old has struggled with.

Jenner's big sis, Kim Kardashian, interviewed the teen about her beauty routine (and those infamous lips) in the new issue of Allure.

KKW: "OK, what's the biggest beauty mistake you've ever made?"

KJ: "Well, I definitely made my lips a little too big at one point."

KKW: "Yeah."

KJ: "I got excited and felt like I needed to do a lot. And then you guys were like, 'Kylie, you need to chill.' And then I had to go back and have it fixed, and it was a crazy process. Thank God I didn't end up on [reality show] 'Botched.'"

But Jenner's plumped pout has resonated with fans, and her Kylie Cosmetics lip kits sell out in minutes.

"My main focus is my cosmetics line," Jenner told her Kardashian when asked what she wants to be when she grows up. "I'm putting all my energy toward that and making it the best I can."

Just to refresh your memory, this is what Jenner's lips used to look like:

And here's what they look like today:

What a time to be alive.