If you like techno/dance at all then you might really love Lee Jung Hyun. I'm absolutely in love with her music. Some songs I'd recommend would be Ari Ari, Nuh, Wa, and Joolae.
I'd also recommend U;NEE, even though she committed suicide earlier this year
Her music is Korean R&B with some dance flavor to it. I really like her song Call Call Call. Baby VOX is pretty good too. They're a group of like four girls.