Song Eun-i is a South Korean singer, actress and comedian. She made her debut as a theater actress in 1993. In the same year, she made her debut as a comedian in KBS. She is currently signed under her own management company Media Lab Seesaw (SISO). Currently, Song is running own company Media Lab Seesaw as CEO with her friend, Kim-Sook as director.

Hidden Singer is a South Korean variety-music TV program broadcast on JTBC. The mechanics are a famous singer and several of their impersonators sing one measure of a song behind the blinds for four rounds. In the first three rounds, an audience of 100 people vote on the person who they think is not the real singer, the person with the most votes would be eliminated. In the final round, the audience votes on who they think is the real singer, the person with the most votes would win the episode. The program is hosted by Jun Hyun-moo.