AOA (에이오에이; an acronym for Ace of Angels) is a three-member girl group under FNC Entertainment. They officially debuted on August 9, 2012 with the single album "Angels' Story".
The group originally consisted of eight members; Cho A, Ji Min, Yu Na, You Kyung, Min A, Hye Jeong, Seol Hyun and Chan Mi, who promote alternately as a dance group and as a band. Until 2013, when the band part of the group debuted as the first official sub-unit, AOA Black, consisting of Cho A, Ji Min, Yu Na, You Kyung and Min A, with the digital single "Moya" and the group started to promote as a dance group.
In 2016, their second official sub-unit called AOA Cream, consisting of Yu Na, Hye Jeong and Chan Mi, debuted with the digital single "I'm Jelly Baby".