Perf-K When fans are given chance to show-off their vocals in front of idols - especially a girl group like SISTAR... a miracle is bound to happen!

[Ash-Pikachu]

My cousin just showed these to me and upon watching I was thoroughly impressed.

 

[BetweenYourThighs]

I saw this last week. I couldn't comprehend the slayage though. Especially the girl in red.

[Usermon]

Same.

[TAE AMO]

I loved this. fantastic duo keeps on delivering, Sistar and Ailee's fans slayed