They're 4 girls, their songs and MCs at concerts are a jumble of Korean and Japanese, I'm a native English speaker but I speak advanced Japanese and I'm learning Korean from Japanese, so it's a linguistic orgasm, and they sing well too and their music isn't that heavy R&B stuff, it's fun Musume-ish pop stuff with ballads too.
I NEED MORE INFO from them!!! Anyone know where I can DL their stuff? Must learn their songs!!! for my studies! heh.