Though Poo Bear often shines as a pop vocalist, he does the majority of his work behind the scenes. He teases Justin Bieber’s sexy side on “Yummy” and pushes Sam Smith’s vulnerability to its limit on “Burning,” revealing unexpected sides of both singers. But Poo Bear’s versatility is his true calling card. As adept in the rap world as he is in pop, Poo Bear has made hits out of Fat Joe & Lil Wayne’s “Make It Rain” and Lupe Fiasco’s “Bitch Bad.”