Born and raised in Thousand Oaks, Cali girl Olivia O'Brien showed prodigious talent for singing, piano and guitar from a young age. In her teens, she started writing her own songs alongside releasing covers online, and eventually caught the attention of rising rapper Gnash when she released a cover of his song Disposable. In 2015, their collaboration on Olivia's track 'i hate u, i love you' peaked in the top 10 of Billboard's Hot 100 chart.