Olivia Gail O'Brien is an American singer and songwriter. She rose to fame in 2016 after collaborating with Gnash on the single "I Hate U, I Love U", which peaked at number 10 on the Billboard Hot 100 chart in the United States and number one in Australia. The success resulted in a recording contract with Island Records, with whom she released two extended plays, three mixtapes, and her debut studio album Was It Even Real? (2019).

Garrett Charles Nash, known by his stage name Gnash, is an American musician, rapper, singer, songwriter, DJ, and record producer. He released his debut extended play (EP), U, in March 2015 on SoundCloud and followed up with the Me EP in December 2015. His third EP, titled Us, was released in March 2017 and includes the single, "I Hate U, I Love U", featuring Olivia O'Brien, which peaked at number 10 on the Billboard Hot 100 and reached number one in Australia. His debut studio album We was released in January 2019, and also features "I Hate U, I Love U".