4) Dr. Dre (Net Worth: $700 Million)

Dr. Dre has produced songs and albums for various artists like Eminem, Mary J. Blige and Eve. However, he owes his fortune to Beats by Dr. Dre headphones, which accounts for 65 percent of the premium headphone market. Dr. Dre got $620 million when Apple acquired Beats by Dr. Dre for $3 billion. He is now worth an estimated $700 million.

3) Diddy (Net Worth: $735 Million)

Diddy is the richest rapper in the world. He is also a smart businessman. He has produced reputed artists like Maria Carey. He is the creator of Sean John clothing line. He owns 50 percent of the profits from Ciroc vodka, a brand that he helped to create. He is also the owner of music oriented digital cable TV network Revolt. He is the richest rapper on the planet, according to Forbes 2015 list.