In ascending order:

20. Jay “Young Jeezy” Jenkins – $6 million, tie
20. Jayceon “The Game” Taylor – $6 million, tie
20. William “Rick Ross” Roberts – $6 million, tie
20. Tramar “Flo Rida” Dillard – $6 million, tie
18. Antwan “Big Boi” Patton – $7 million, tie
18. Andre “Andre 3000″ Benjamin – $7 million, tie
14. Kasseem “Swizz Beatz” Dean – $8 million, tie
14. Clifford “T.I.” Harris – $8 million, tie
14. William “will.i.am” Adams – $8 million, tie
14. Lonnie “Common” Lynn, Jr. – $8 million, tie
13. Christopher “Ludacris” Bridges – $10 million
12. Calvin “Snoop Dogg” Broadus – $11 million
11. Andre “Dr. Dre” Young – $13 million
10. Marshall “Eminem” Mathers – $14 million
9. Faheem “T-Pain” Najm – $15 million
8. Pharrell Williams – $16 million
7. Timothy “Timbaland” Mosley – $17 million
6. Dwayne “Lil Wayne” Carter – $18 million
4. Aliaune “Akon” Thiam – $20 million, tie
4. Curtis “50 Cent” Jackson – $20 million, tie
3. Kanye West – $25 million
2. Sean “Diddy” Combs – $30 million
1. Shawn “Jay-Z” Carter – $35 million

Forbes Link