Young K-pop fans may just kill for the chance to walk backstage on the set of "M Countdown," a popular cable television music program in South Korea.

A few short steps and the immaculately styled Lee Sung Min, a member of the band Super Junior, whizzes by. Then up ahead, in a room with a paper sign showing the group's name on the door, there's Shin Dong Hee having his violet-colored hair fussed over, as Choi Si Won steps into the room.

With its 10 members executing dance moves and addictive tunes in unison, Super Junior is one of the latest acts topping charts in Korea, Taiwan and China, and selling out seats at Tokyo Dome. But that hasn't stopped the group and its talented members from evolving.