Olivia O'Brien is an American singer-songwriter who rose to fame with her 2019 single "i hate u, i love u." Born and raised in California, O'Brien began writing songs at a young age and released her debut EP, "It's Not That Deep," in 2018. Her music is known for its raw and honest lyrics, which often explore themes of love, heartbreak, and self-discovery. O'Brien has collaborated with artists such as gnash, blackbear, and The Chainsmokers, and has toured extensively throughout the United States and Europe.