Lee Seung Gi brought up his younger sister on the April 14 installment of SBS' 'Healing Camp.'

In relation to his family, the singer mentioned, "The whole household does not really tell others that there is a celebrity in the family. My younger sister was going through puberty in high school, so she paid a lot of attention to her appearance. Everyone called her long-haired Lee Seung Gi."  Even though nobody knew she was Lee Seung Gi's younger sister, she must have had a striking resemblance to him!

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He continued, "I think her friends teased her in high school. My younger sister was really surprised, so she said to her friends, 'Why would I look like Lee Seung Gi?' and got angry."

Lee Seung Gi went on, "Now, [the fact that I'm her brother] was revealed a bit because there was no choice, so she changed her hairstyle a lot," making everybody in the studio laugh.