As Rob Base & DJ E-Z Rock once noted, “It takes two to make it outtasight.” And as with romantic relationships, so too with rap. There is a special magic that happens when two seasoned MCs go back and forth, simultaneously competing with and complementing one another. Each pushes their counterpart to go harder, communicating in their own secret language, making every song a conversation as opposed to a recitation. Here are a couple of the best duos to ever hit the rap scene!