Fetty Wap hails from New Jersey, but you'd never guess it from his music. The rapper-turned-singer who ruled 2015 owes more to the Southern hip-hop tradition than he does his East Coast roots, taking musical cues from Atlanta street crooners like Future and Rich Homie Quan and echoing the mush-mouthed flow of Gucci Mane—whose nickname, "Guwop", inspired Fetty's own sobriquet.