Guest List: 2 Chainz

Few rappers in history bring such a consistent level of craft to their guest spots. On "Mercy", 2 Chainz bats clean-up for a murderer's row of hip-hop stars and knocks his comical verse out of the park. He's lewd and lowbrow on Nicki Minaj's "Beez In the Trap", memorably rhyming "Nicki" with "doohickey". And he provides delicious contrast to Beyoncé on The-Dream's “Turnt”.