AOA (Hangul: 에이오에이; an acronym for Ace of Angels) is a South Korean idol girl group signed under FNC Entertainment. Initially, AOA debuted as an eight-member girlband that consisted of Choa, Jimin, Yuna, Youkyung, Chanmi, Hyejeong, Seolhyun, and Mina. Currently, AOA is promoting as a seven-member idol girl group without Youkyung, who was only a part of AOA Black. The group officially debuted by having their debut music stage on August 9, 2012, on M! Countdown.
On October 15, 2016, FNC Entertainment released an official statement announcing the departure of Youkyung from the group, following the termination of her contract.
On March 11, 2017 AOA held their first solo concert “Ace Of Angels” at Olympic Hall in Seoul.