An ex-member of Girl's Day appeared on 'I Can See Your Voice 5' and sang Kim Chung Ha's "Why Don't You Know".

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On the April 6 episode of the Mnet variety show, Lee Ji In, a former member of Girl's Day, appeared as a real singer. Back in 2010, Lee Ji In left the group after their "How About Me" promotions, with reasons related to her personal wishes to take proper acting lessons.

After leaving Girl's Day, Lee Ji In had worked for a variety of part-time jobs. "My status became very unstable after leaving the group, so I had to work as a model and work at convenience stores and Internet cafes. The one thing that helped me get through all this was my long-time passion to become an actress," shared Lee Ji In.

On the episode, the ex-girl group member sang Kim Chung Ha's song "Why Don't You Know", taking the stage for the first time in 17 years as a singer.

Lee Ji In currently identifies herself as an actress, and said that she will "try the very best to keep pursuing a career in acting, as well as in music."

Do you remember this member from Girl's Day's early years? Watch the full clip to see Lee Ji In perform!