The claim that Kylie Jenner is the world's youngest self-made billionaire is likely to have been exaggerated, according to a new report from Forbes. The publication believes that Kylie, along with her mother and manager, Kris Jenner, have been inflating the success of Kylie's makeup venture, Kylie Cosmetics, over the years.Forbes also revealed that Kris owns a stake in the company, leaving Kylie's ownership share to be only 44.1 percent versus the publicized 49 percent.