Chief Keef, the 16-year-old unsigned rapper from Chicago, is still on house arrest at his Grandma's, but now he has a Kanye West remix to his name, because technology has had something of an effect on musical collaborations. Instead of recording in the studio together, Kanye sent some producers from his new label, G.O.O.D. music, to Keef's home in Chicago, where they set up a laptop and a microphone. Keef typed out a verse onto his iPhone on the spot, then yelled into a microphone for a few minutes, and this banger of a street remix was born.