Kylie Jenner adjusts her hair as Kendall Jenner and Kylie Jenner arrive at Chadstone Shopping Centre on November 18, 2015 in Melbourne, Australia. And the Kylie Cosmetics founder and owner certainly lived up to expectations.
She told Forbes, "I popped up at a few stores, I did my usual social media - I did what I usually do, and it just worked".
Jenner's fortune comes from Kylie Cosmetics, the makeup company she runs largely from her iPhone, with the help of her mother, Kris.
Although it first started out as only available online, the brand's move into Ulta stores previous year lead to huge profits for the young mogul. It sells for $29. Forbes estimates the business is worth about US$900 million (NZ$1.3b).
Facebook founder and CEO Mark Zuckerberg dropped three places to No. 8, as his fortune fell by $8.7 billion to $62.3 billion. Her cosmetic line, Kylie Cosmetics, made an estimate of $508 million in sales a year ago. Jenner, the youngest member of the Kardashian-Jenner clan, has amassed 128 million Instagram followers and leveraged that popularity to promote her products. "She's not. I would have her number four on the list of Kardashians, and the two above her aren't much better". "I had such a strong reach before I was able to start anything".
Seething, he said: "Wait a minute, when you say self-made billionaire".
Before she was launched into the public consciousness for her lips (whether they were real or injections), she had been appearing on the Kardashian reality TV show "Keeping Up with the Kardashians" and doing modelling gigs.
"We consider any person who built her own fortune, and didn't inherit the money, to be self-made", she wrote.