Kylie Jenner, 22
Net worth: $ 1 billion.
They say she is a model, a socialite, an influencer, a designer. All true, but what made her rich at the age of 21 was her cosmetics company that she raised and sold for 600 million dollars last November. She still holds 49% of the company shares. She ousted Mark Zuckerberg as the youngest person with a billion dollars in history. He got it at 23.
