which celebrity has the most net worth 2019?
['George Lucas. Net worth: $5.4 billion.', 'Steven Spielberg. $3.7 billion.', 'Oprah Winfrey. $2.8 billion.', 'Michael Jordan. $1.7 billion.', 'David Copperfield. $875 million.', 'Sean "Diddy" Combs. $825 million.']