S-level singers that will sell 1 million copies of Cho Sung-mo and Echo-ti G.O.D. (Among them, Sung Mo-hyung is the first)
A-level cool Yoo Seung-jun Lim Chang-jung Kim Hyun-jung Lee Soo-young Fin.K.L. Shinhwa Singers who sell around 500,000 copies and often take first place
B-grade Hong Kyung-min Clone Coyote Shop Singers who have semi-mega hits but cannot sell 500,000 copies
C-level divas un plum Sung Si-kyung Kim Jang-hoon Singers with high recognition but no major achievements
D grade Jung Il-young arcade Indigo one-hit wonder singers
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