Not so fast Dr. Dre. According to a rep at Forbes, once his $3.2 billion Beats by Dre deal with Apple is finalized, the rap mogul still won't be a billionaire.

According to TMZ, Forbes Assistant Managing Editor for Wealth broke the numbers down. Dre will cash in just under the billion-dollar mark.
Dre only owns 25-percent of Beats, meaning the most he can make from the deal is $800 million. Once you factor in state and federal taxes, he will be left with $480 million. Add that to his other assets and he'll be just under the billion-dollar mark with a net worth of $800 million.

"Not quite enough to debut on the Forbes 400 but plenty for bragging rights," the Forbes editor said.