She became known for being one of the youngest people in the world to undergo an operation to change her sex assigned at birth. She began recording music at the age of 19, and was still a teenager when she released her first "extended play" (EP) "One Piece of Tape" in 2011. She released her first single in 2017, titled "I Don't Want It at All", which charted high on Spotify, earning Petras a contract with the company. She was featured on Charli XCX 's mixtape, "Pop 2" (2017), along with Jay Park on the song "Unlock It", and on her album, "Charli" (2019), along with Tommy Cash on the song "Click".