I'm sure once he gets more exposure and comfortable in the US market, he can bring on his own style. Just a guess.

I love this performance! It's one of my fave songs from his first album! And he's still a baby in it! His lives are amazing, like seriously, no one else in Korea performs so well live like him.
http://www.dailymotion.com/video/x1q...mmf-2003_music