Um...Grimmo,
To suggest that Kim Jaejoong and Park Yoochun have had cosmetic surgery is a little harsh, don't you think? I say their haircuts and babyfat makes them look a lot different. Look at Yoochun's baby pictures, he's pretty much the same. JaeJoong lost all of his babyfat, but to me his facial features haven't changed as much. Personally, I think they just grew up.
But since they have neither denied or confessed having surgery, we will never really know.