However, things really turned around for them when Finneas and her put the song Ocean Eyes on SoundCloud, after being instructed by a dance teacher to record a song for a routine.
While this was not their first song, the music gained radio play from a huge number of outlets, with people such as Zane Lowe, Annie Mac and even Radio 1 taking on the song.
After the video for Ocean Eyes was released, Billie released further songs like Six Feet Under, Bellyache and Bored, the latter of which was part of the soundtrack to the Netflix series 13 Reasons Why.
Her work has been described as “dark pop,” and shows influences from singers such as Lana del Rey, who is known for her melancholy style.
While 2015 to 2017 were successful years for Billie, her real breakthrough came in 2018 when she started releasing music linked to her upcoming album, When We All Fall Asleep, Where Do We Go?