Though the average viewer probably wouldn’t be able to tell that there was anyone missing from the oversized boy band, Super Junior has decided to fill in Kim Heechul′s empty spot with...Kim Jang Hoon?

Somehow, we can’t see the veteran rocker dancing to A-CHA, and thankfully (or sadly...), we won’t have to, since the band members are actually taking Kim Heechul′s spot, rather than the other way around. Sorry ajumas.

Heechul, who featured on Kim’s single, Breakups are So Like Me before enlisting in the army, is obviously unable to sing on stage with the rocker, but Super Junior members Yesung, Eunhyuk and Shindong have been practicing the song in their spare time in order to perform with Kim on KBS2’s Music Bank and MBC’s Show! Music Core.

Heechul recorded the song and finished shooting the music video just a day before he entered his military training camp. He expressed his gratitude to Kim Jang Hoon via his Twitter, writing, “Jang Hoon hyung gave me a present for my last year in my 20s.”

The song was released on September 27 through various online music sites.

Photo credit: SM Entertainment, Yesung′s Twitter