Jay-Z, Kylie Jenner (tie)

Rapper Jay-Z and reality TV star/entrepreneur Kylie Jenner are tied on the list with $900 million each. Both stars are on their way to the $1 billion mark. Jay-Z has done so through albums, songs, concerts, and investment ventures in Tidal, Roc Nation, and alcohol brands. At just 21 years old, Jenner has her booming cosmetics line and other products. Which star will cross the $1 billion level first?