Net worth: $740 million

Dr. Dre first gained mainstream success as a producer for the rap group N.W.A. Since then, Dre has produced for countless other artists and has had a critically and commercially successful solo career. Dre has his own label, Aftermath Entertainment, which features artists like Kendrick Lamar, Eminem, and Anderson .Paak. But Dre’s most successful business, and the reason he’s in the top 3 of this list, is Beats Electronics. In 2014, Dre sold the company to Apple for a reported $3.2 billion, and as a major shareholder in the company, it's safe to say that Dre made a pretty penny off the sale.

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