Korean TV station MBC has recently conducted a survey among Koreans from teenage to 70s in age… pop star Rain is the favorite male artist among ladies in their 70s lol.
Some other stats…
Actor Jang Dong-gun is the favorite among ladies ranged from 30s to 60s; Jo In-sung is the favorite among 20s.
Kim Tae-hee is the favorite among guys in teenage, 20s and 40s; Son Ye-jin the favorite among guys in 30s.
[Source - Sina]