Lewis began his writing career alongside uber-producer Dr Luke, and his rapping skills featured on the Nicki Minaj song Trini Dem Girls. He enjoyed further success with artists like Jessie J and and Fifth Harmony before storming the global charts with his own song Bills in 2015. He continues to enjoy success with a broad range of artists both within the pop field with One Direction and the bands solo projects, hits with Jason Derulo and Flo Rida as well as deep in the hip hop genre with Yo Gotti, Lil Wayne and Juicy J.