To compile net worths, we valued those who hold private companies by speaking with an array of outside experts and conservatively comparing the companies with public competitors. We calculated the stakes in public companies using stock prices from December 5. For entertainers, we based our estimates on net lifetime earnings. Real estate, art and other assets were also factored in where applicable. To be eligible for this list, celebrities had to be American citizen who had gotten rich off their fame, rather than become famous for their wealth. We attempted to vet these numbers with all list members. Some cooperated; some didn’t.