Basically any song by DBSK/TVXQ is gold (and they're the closest you'll get to Kpop singers that can actually sing, they're insanely talented and former member Xia Junsu is nicknamed 'Korean Mozart') They have songs in Korean, Japanese, Chinese and English.

Mirotic is soo good, you have good taste xD Try listening to your my melody, Love in the ice, Doutroute, O, Hug, wrong number, stay with me tonight, Toki wo tomete...etc I could go on xD