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During the recording of the upcoming episode of 'Quiz to Change the World', the singer and tv personality dropped an interesting piece of info as he said, "During my H.O.T days, my younger sister passed the audition for SM Entertainment... At Lee Soo Man's request, my younger sister tried out for the new girl group SM was preparing (S.E.S) and was accepted at once thanks to her amazing dancing skills."

However, his sister ended up not debuting as Moon Hee Jun was very opposed to the idea from the beginning. 

Having experienced the high-fame celebrity life as a member of H.O.T, Moon Hee Jun had wished for his sister to spend a free and normal youth like others her age, something he wasn't able to do. He revealed that he was eventually able to talk his sister out of debuting with S.E.S, surprising the other guests on set who wondered what the group may have been like with his sister as one of the members.

To learn more details about all this and other stories that the singer will open up about, make sure to tune into 'Quiz to Change the World' airing later today!