Funny how music taste can change. I remember not being a fan of Wondergirls and SNSD, but Nobody (Wondergirls) and Gee (SNSD) has got me hooked into them lol. It one of those sangs that after hearing a while u find them v addictive lol. A very underrated group who seems to have gone all quiet is Big Mama, really talented k-ballad singers.
Right now it's gonna have to be SNSD but if you think about it DBSK (800,000 is a huge number of fans) and hmm.. they are grown men.. *walks away*
dbsk is definetly the most popular right now :/ (sorry not really a fan of them :O) and big bang, super junior, shinee, etc. mostly boybands id say.