Hip-hop has long benefited from camaraderie and collaboration, from Dre  and Snoop 's West Coast repping to Clipse 's drug-dealer verse-trading. With the release of "Watch The Throne," Kanye West  and Jay-Z  join the list of hip-hop artists who used their individual skills to create lasting music as part of a duo.
Check out Billboard.com's list of 20 Dynamic Hip-Hop Duos, and tell us who you think is the greatest rap duo of all time.
Check Out More 'Watch The Throne' Coverage Below:
- The Juice