My students alleged that I resemble pop star 임재범 [im-jae-beom, which he himself prefers to romanize as Yim Jae Beum (which is, in my opinion, a truly misleading and horrible way to romanize it, but, well, with names there's a lot of freedom on this matter in Korea)].
[broken link! FIXME] I don't really think I do.
In researching it (i.e. typing his name into a Korean search engine and seeing what pops up), I think it must just be the glasses and the haircut, more than anything else. Perhaps the rather exaggerated way he changes his facial expressions as he sings – I do that a little bit during my classroom antics. I certainly don't sing like him, though.