2PM's Junsu is featured in T-ara's Bo Peep Bo Peep?

T-ara's performance of Bo Peep Bo Peep on Music Core earlier today had a special male voice in the background. People were confused as to who it was and whether or not it was a mistake. It was none other than 2PM's Junsu! And was later confirmed by Taecyeon and 2AM Seulong's posts on Junsu's mini-hompy. Taecyeon wrote, "You singing Bo Peep Bo Peep was aired. Go apologize to T-ara right now!" Seulong wrote, "I knew it was Junsu as soon as I heard it." Netizens commented, "His voice. Jun Peep Jun Peep," and "Junsu's featuring. So funny!" Isn't this whole accident pretty hilarious? Of course it's 2PM who caused this. After listening to it myself, I couldn't help but laugh because of how his voice sounds and how loud it is: (It's in the very beginning)