Kylie Skin: How Kylie Jenner became the world's youngest 'self-made' billionaire, from starring in a reality TV show at age 9 to selling a majority stake in her billion-dollar cosmetics empire at 22

Rick Kern/Getty Images for Ulta Beauty22-year-old Kylie Jenner, the world's youngest "self-made" billionaire, just sold a 51% stake in her namesake brand, Kylie Cosmetics, for $600 million to Coty Inc., according to The Wall Street Journal.In March, Forbes estimated that Kylie Cosmetics was worth $900 million. That plus the cash she pulled in from the business brought her to billionaire status, Forbes said.Now, the $600 million deal with Coty values the company at $1.2 billion.Here are all the ways Jenner makes her millions, from Kylie Cosmetics to TV to product endorsements.Visit Business Insider's homepage for more stories.Kim Kardashian West might be the most prominent of the Kardashian-Jenner clan, but Kylie Jenner is by far the richest.According to The Wall Street Journal, Jenner sold a majority stake in her cosmetics company to beauty conglomerate Coty Inc. for $600 million, valuing the company at $1.2 billion. She will, according to The Journal, continue to be the face of the company; the deal is expected to close late next year.Jenner, now 22, was named the world's youngest self-made billionaire at 21 years old in March, mostly thanks to Kylie Cosmetics. The next-wealthiest member of the Kardashian-Jenners is Kim Kardashian West, who's worth an estimated $370 million.Many have criticized Forbes' decision to call Jenner "self-made," saying she was born into wealth and privilege. In February, Jenner responded to the backlash in an interview with Paper magazine, saying, "The self-made thing is true" and adding that her parents "cut her off at the age of 15." Jenner has built up a cosmetics empire, starred alongside her family in "Keeping Up with the Kardashians" as well as in her own spin-off show "Life of Kylie," started a clothing line with her sister, and made millions promoting products on Instagram.Here are all the ways Jenner has amassed her fortune.Kylie Jenner, 22, is the world's youngest "self-made" billionaire, according to Forbes.Axelle/Bauer-Griffin/FilmMagicSource: ForbesForbes estimated that Jenner's company, Kylie Cosmetics, was worth $900 million in March.Jamie McCarthy/Getty ImagesSource: ForbesJenner's first job was on reality TV show "Keeping Up With The Kardashians." She was 9 years old when the first episode aired and the show is now airing its 17th season.YouTube/UniversalPlaybackTVSource: Business InsiderSee the rest of the story at Business InsiderSee Also:This is how the world's 5 youngest billionaires spend their time and moneyKylie Jenner just agreed to sell a controlling stake in her makeup company for $600 million. Here's how she and 4 other billionaire celebrities became so much richer than their Hollywood peers.Under Armour is making headlines again over its accounting practices. Here's how the company's billionaire founder, Kevin Plank, makes and spends his money.SEE ALSO: Every member of the Kardashian-Jenner family, ranked by net worthDON'T MISS: Kylie Jenner just agreed to sell a majority stake in her makeup company for $600 million