When asked about what kind of an artist he was, Wheesung revealed that he is a greedy artist who is always looking to improve, and because of stubbornness of being perfect he gets severely nervous being on stage. 

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Wheesung said, "I get severely nervous when I'm on stage. It's very serious to the point where people wouldn't understand. My fans know of this [as well]. And sometimes the up and down is really severe, and it even gets hard for me to breathe. I think of how great it would be to sing without concerning myself about the cameras."

However, despite the doubts he had, the singer gave an outstanding performance, belting out powerful high notes. 

Check out his performance on 'I Am A Singer 3' below!