She became a savvy business woman at just 18 years old! Kylie Jenner rose to fame on her family’s long-running E! series Keeping Up with the Kardashians, but she proved that she is more than just a reality TV star. In just 18 months, her makeup line Kylie Cosmetics — which is known for her signature lip kits — has made $420 million, earning her the title as beauty icon at such a young age.

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In a new interview with Women’s Wear Daily, Kylie and her mom Kris Jenner — who is the matriarch and mastermind of the Kardashian/Jenner empire — explained how they were able to reach such astronomical numbers since November 2015, when the company first launched.

They started out with a limited test run of 15,000, then increased to 500,000 of the six original shades three months later, and now they’re pumping out 300,000 units of each individual shade. In 2017 alone, Kylie Cosmetics is on track to see a 25 percent increase in sales — thanks in part to the launch of her birthday collection which sold $10 million in the first day — and if the company continues to grow at that pace, the company will be worth a billion dollars by Kylie’s 25th birthday. It took makeup brand Bobbi Brown 25 years to reach one billion and Lancôme finally reached that milestone in 2015 after 80 years.

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“What I’ve been into is creating collections; that’s kinda my thing,” the 19-year-old told WWD about her job as the creative mastermind behind her brand. “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’s having so much fun with creating more products for Kylie Cosmetics, she isn’t planning to sell her company anytime soon. “I want to keep building it and just show people what I can do on my own,” she revealed.

Scroll through the gallery below to see Kylie’s latest blush line!