Marteen began his career by posting
covers of
pop songs to his Instagram account at age 12. In December 2014, at age 13, Marteen was featured on a track entitled "What It's All About" by his older cousin,
Kehlani. Record producer
J. R. Rotem began working with Marteen a year later. In 2016, Marteen opened for Fifth Harmony,
Bryson Tiller, and Kehlani prior to releasing his first independent mixtape,
Focused, in August of that year. In May 2017, Marteen appeared on select dates as an opener for Kehlani on her
SweetSexySavage World Tour. In July, Marteen was signed to Warner Bros. Records in association with J. R. Rotem's Lyon Estates record label. His debut single on Warner Bros. Records,
Sriracha, was released the following month with an accompanying music video that was shot in
West Oakland. In October 2017, Marteen announced an upcoming EP and an opening slot on
Dua Lipa's Fall 2017 tour. Marteen released his major label debut EP titled
NOTHANKYOU. on February 23, 2018. On November 8, 2019, he released his second mixtape
8. In 2022, he appeared in a small supporting role in the horror film
Halloween Ends. == Discography ==