Singer/songwriter/producer Mike Posner has some signature moves: he's a master of the murmured midtempo verse and the blissed-out falsetto chorus. His grooves start out subtle, riding a Spanish guitar riff or a low-key sample, and bust open with a big snare beat or a well-timed spoken-word interlude. The result is killer hits, whether he's singing them himself or supplying the goods to stars like Bieber and Snoop.