Star vocal trainer Kim Sung Eun�became popular after her appearance on 'Produce 101'. She has been teaching a lot of idols in her career, and she chose two that stood out the most to her in an interview with Sisun News!

When asked which stars and episodes she remembered the most during her teaching career, she said, "The first is BTS' Jin. One day, Jin suddenly sent me a song. He said, 'Teacher, this is a song you used as a lesson before. I tried recording it for real this time. Didn't I get a lot better at singing?' He was so amazing. Actually, that song doesn't have a proper MR, but Jin made an MR for himself and recorded it properly in a studio. I cried so hard at 3AM listening to that song. Jin is an amazing person. Even now, when BTS has a concert, he invites me whether it's in Korea or overseas."

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She then said, "The second is the girl group TWICE. For a while, TWICE has been #1 on the charts. During that time, they had opportunities to give their 1st place acceptance speeches on music shows. As soon as they got the mic, they said, 'Sung Eun-sunsaengnim, thank you'. All the idols that I teach promise to say my name during their #1 speech. But some of them have not gotten #1, and others forget during the speech because they're so overwhelmed, and call me right after and cry while thanking me. However, even though TWICE must have been overwhelmed by their win, they�remembered�me and said my name. Yesterday, I saw them at their label, and they ran over and hugged me. I was so touched."