Mary Perez has 1 Olivia O'Brien concert.

Olivia O'Brien, born November 26, 1999 in Thousand Oaks, California, 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.” After “i hate u, i love u” she released a cover of Avril Lavigne’s “Complicated” in 2015 before releasing her debut single “Trust Issues” on August 11th, 2016. Throughout the remainder of 2016 Olivia dropped 3 more songs, “Root Bear Float (feat.