Matthew Tyler Musto (born November 27, 1990), known professionally as blackbear, is an American hip hop recording artist, singer, songwriter and record producer. Blackbear is best known for his rap and R&B-oriented music. He has collaborated with several well-known musical artists such as Justin Bieber, G-Eazy, Mike Posner and Childish Gambino. Musto also co-wrote "Boyfriend" by Justin Bieber, which debuted at number 2 on the Billboard Hot 100