9. Ludacris vs Limp Biskit - Luda's Move with Limp Biskit's Nookie!
8. Biggie vs Joan Jett - Big's Hypnotize with Joan Jett's I Love Rock n Roll
7. Linkin Park vs Mobb Deep - Linkin Park's In the End with Mobb Deep's Got it Twisted
6. Jay-Z vs Linkin Park - Jay-z's Dirt off Your Shoulder with Linkin Park's Lying from You
5. Tupac vs Survivor - Tupac's Holler if you Hear Me with Survivor's Eye of the Tiger
4. DMX vs Nirvana - DMX's No Love for Me with Nirvana's Smells Like Teen Spirit
3. Mobb Deep vs Jimi Hendrix - Mobb Deep's Shook Ones vs Jimi Hendrix's Foxy
2. Eminem vs Disturbed - Eminem's Til I Collapse with Distrubed's Down with the Sickness
1. Biggie vs Led Zepplin - Biggie's Dead Wrong with Led Zepplin's Whole lotta Love
There you have it 9 mash ups to add to a workout playlist.