South Korean singer/songwriter Ahn Ye Eun is best known for singing on the soundtrack for Korean television series The Rebel. She emerged into the spotlight in 2015 after appearing on season five of the reality show K-Pop Star, on which she was a runner-up in the competition. She later signed to XX Entertainment, which would help her to put out three solo albums, including her self-titled debut in 2016, 2018's O, and 2020's o o o.