I'm not very familiar with Korean music.
I'm probably most familiar with BoA. I own her last two Korean CDs. I heard she was going to stop performing because she "no longer enjoys it" and is going to go to school in the US.
Yeah, I'm sure that's going to be much more rewarding. Of course, that was a long time ago, so that could have changed. I don't really keep up with her anymore.
Anywho, the most recent Korean thing I've heard was that promotional group Anyband, which included BoA and three other people I don't know. They were promoting a cellphone or something.