Olivia O'Brien (born November 26, 1999) is an American singer and songwriter. She is best known for her collaboration with gnash on the Billboard Hot 100 top 10 song, "i hate u, i love u". She has since released her debut single "Trust Issues" and two follow-ups, "Root Beer Float", featuring Blackbear and "Find What You're Looking For" Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.