Biography: Jason Boyd (born 1979), better known by his stage name Poo Bear, is an American record producer, vocal producer, singer and songwriter. He is best known for being one of Justin Bieber's main collaborators, having co-written many of Bieber's hits (including "Despacito (Remix)", "Where Are Ü Now", "What Do You Mean?", "PYD", "Hold Tight" and "All That Matters"), and for co-writing the song "Caught Up" from Usher's Diamond-certified album Confessions.