Passage: The album features guest vocals from Travis Scott, Big Sean and Halsey, and production help from Skrillex and Diplo. With the help of his personal friend and frequent collaborator Jason Boyd, Bieber started writing and recording with the idea of making an inspirational album that could encourage people through uplifting messages during a period of all his media scrutiny and his involvement in various misdemeanours, as well as his relationship with his former girlfriend Selena Gomez.

Question: Who helped produce the album?
Skrillex and Diplo