From Forbes.com:

"After years of violent rivalry marked by the murders of such icons as Tupac Shakur and the Notorious B.I.G., hip-hop's focus has shifted from beef to cake--making money, that is. Unlike most pop and rock musicians, who make the bulk of their earnings from record sales and tours, many of hip-hop's biggest stars preside over vast entertainment empires. "

 

 Here is the ranking...with a few ties:

 

1. 50 Cent - $150MM

2. Jay-Z  -

3. Diddy

4. Kanye West

5. Timbaland

6. Pharrell

7. Swizz Beats

8. Snoop Dogg

9. Dr. Dre

10. Ludacris

11. T.I.

11. Lil Wayne

12. Eminem

12. Common

12. Akon

13. Jermaine Dupri

13. Lil Jon

14. OutKast

14. Chamillionaire

14. The Game