I love how fucking iconic Wonder Girls still are within K-pop despite the fact that they were technically only stratospherically huge for about two years. They couldn't keep their sky-high popularity going in the same way that Girls' Generation or BIGBANG have (JYP's fault, obviously), but their initial success left such a deep mark that they're still more relevant than most of the top active K-pop acts today.
Korea is obsessed with random rankings, surveys, and polls. Most of it's just inane shit that isn't worth reading ("So-and-so voted the celebrity people most likely want to read a bedtime story to"), but I get a kick out of popularity rankings. The downside is that most of them are usually biased or uninformed, like the new 2014 Girl Group Popularity Ranking that Sports Chosun published today.