Two heads are often better than one, no matter what realm you're talking about; Michael Jordan might have grabbed only a couple of his six rings without Scottie Pippen; Kobe Bryant would probably have a pair less, too, were it not for Shaq. And with one of the all-time great rapping duos ever making their triumphant return at Coachella last weekend—and making a second pass at it this weekend, too—XXL got to thinking about the greatest duos of all time. But we wanted to make sure everyone was competing on a level playing field, so we focused on duos that were from the two-rapper setup, rather than the rapper-producer combo. This excludes many of our favorites—Eric B. and Rakim, Gang Starr, Pete Rock & CL Smooth, Madvillain, even newcomers like Macklemore & Ryan Lewis—but we'll get to them later (and before anyone says anything, Public Enemy was more than just Chuck D and Flavor Flav). Without further ado, here are XXL's ten best rapper duos of all time. Let the debates begin. —XXL Staff with Jordan Lebeau