Na Haeun is most known for her cover dances on Youtube, where she has over 1 million subscribers. She also appeared at the Melon Music Awards 2017 and on Star King in the past. The 9-year old will make her official debut with the song "So Special" on the 26th. On the 24th, Haeun will be having her first stage at a fanmeeting & showcase which will be streamed live on YouTube.
source: 어썸하은 [Awesome Haeun] yt