This is insane!

Kylie Jenner is only 20-years-old, but her makeup line has already raked in a whopping $420 million in just 18 months since it launched, WWD reports.

Not only that, but her brand is on track to become a billion dollar business by the time she's 25-years-old, and has accomplished that in way less time than other major names like Bobbi Brown and Lancome. Wow! The reality star's latest birthday collection made $10 million in just one day, resulting in her second-highest sales day ever.

So what's the secret to her success?

"What I’ve been into is creating collections; that’s kinda my thing. I like getting in different moods. In the beginning I thought my brand had to be consistent and everything look the same and that was stressing me out. And that’s really not my personality. I like to have blue hair one day and blonde the next…and collections are where I kind of get to express myself. I change everything…I love to switch it up and come out with new products," she told the outlet. Clearly it's working!

The Life of Kylie star wants to expand into foundation and concealer, but she makes it clear she's not competing with sister Kim for customers. "We’re both really proud of each other – and our brands are also completely different …just visually…there’s definitely enough room for the both of us," she explained.

She's taking over the world!