Singer Hwang Chi Yeol appeared on KBS 2TV's 'Happy Together 3' on January 14 and grabbed attention for revealing that he had promoted as a vocal trainer for famous celebrities in the past.

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"Before I got big, my dream was to earn money and create a vocal school," he said, revealing he had wanted to give up on his dream of being a singer when he was not well known.  "At the time, I taught INFINITE, After School, Lovelyz, and more."

He continued to everyone's amusement, "I taught actor Seo Kang Jun, too.  During a lesson with Seo Kang Jun, I almost burst an artery," making everyone laugh.  Well, at least he is a super talented actor, right?