Dark Sky Paradise

Over four years and two albums, Detroit rapper Big Sean has made his biggest mark as a semi-novelty hitmaker (the awesomely stupid “Dance (A$$),” the giddily spiteful “IDFWU”) and the worst part of at least five Kanye West songs. Big Sean is G.O.O.D. Music “trying to make ‘fetch’ happen” — keep supporting this guy, and…