Frank Kogan

Or maybe they wanted to give more singing time to Eunjung (and to Hyomin, for that matter). Or maybe adding a member is the guy's way of telling the other members "No one's irreplaceable."

(I haven't read much about agency and group rules and procedures in K-pop, but I recall a few things that gave the impression that, though the T-ara women feel overworked, they're not afraid to speak their minds, so may not be worried about specific retaliation and are not subjected to mickey-mouse rules such as "No boyfriends" and such. But that was based on just a couple of comments I don't remember well, or where I saw them.)