Katy Perry and John Legend), Mikky Ekko (Rihanna and Christina Aguilera), Jeff "Gitty" Gitelman (H.E.R., Jennifer Lopez, Hozier) and Rocky Block (Morgan Wallen, Post Malone, Jelly Roll).

They partnered the musician with professional writers like Julian Bunetta (Sabrina Carpenter, One Direction) and Mikky Ekko (Rihanna, Drake) – but he also retained his high school band ...