The singer became the 773rd member of the club as she promised to donate a total of 100 million won for the next five years, the Community Chest of Korea in central Seoul said.
She made the promise during her visit to the charity organization earlier in the day.
During the visit, Insooni was also named a goodwill ambassador of the charity group.
Since its foundation in December 2007, the society has raised 85.6 billion won from its members to help the underprivileged.
Celebrities who are members of the club include entertainer Hyunyoung, actor Kim Bo-sung, actress Suae, singer Hyunsook and Yuna, a member of the K-pop group Girls’ Generation.
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