With BeyoncĂ© and Jay Z's combined net worth estimated to be $900 million, legal experts are reporting that their divorce could cost upwards of an astounding $1 billion. “It would be the most expensive celebrity divorce in history,” Goldie Schon, a California family lawyer, told Life & Style. “Attorneys’ fees and professional fees could be in excess of $100,000 every month. The cost of divorce is endless.”