Read more STYLE here: Kylie Jenner was named “the youngest self-made billionaire ever” by Forbes magazine in March.br br At just 21, the American media personality is worth US$1 billion, and her cosmetics company, Kylie Cosmetics, is valued at US$900 million.br br With her new-found billionaire status, Kylie is now the most financially successful member of her family.br br Watch to see how she spends her money.