Ever wonder why is it always there three that are always successful in korean pop industry?
seriously, actually you can almost say the teenage idolizing is dominated by the three power houses namely JYP, SM and YG entertainment.
jyp Park Jin Young (aka JYP) and the other two (below) Lee Soo Man (left) and Yang Hyun Sook (right) perhaps are similar to Japan's Johnny of JE.


JYP gave birth to G.O.D, wonder girls, 2am, 2pm.
while SM created HOT, boA , Shin Hwa, SES, DBSK, Super Junior, CSJH, the Trax, SNSD, SHINee, f(X) and many more.
YG is the creator of 1TYM, big bang, se7en, 2ne1.
apart from that there is also DSP, owner of sechskies, fin.k.l, ss501 and kara. But not to offend any one, i find among the big companies, DSP is the one who focuses most on looks and doest really care about talents. (if im not wrong even the director say it himself).
why is it so?
perhaps because the three men have sharp eyes for talents, well, to say talents may still be ambiguous, but the thing is, they know the formula to capture people's heart through music, dancing and the idols' personality. They have good marketing strategy and concepts for their idol groups. Not to say they have enough money and stakeholders to promote the idols too.

there is a need to balance talents, looks, personality and group concept. perhaps this is why idol groups are bound to succeed rather than the solo path.
usually in a group, there is a role for everything.
i guess in an idol groups, they need a cute role, the rapper, the dancer, the best looking, the funny, the leader and such.