Ever wonder how Seventeen boys play inside a karaoke room? Then this is a must-watch for you.

On their 1st anniversary yesterday, Seventeen held a V-live for fans and the boys were led to the basement for a surprise event prepared by Pledis staff. The boys are touched to see a specially set-up room filled with love letters and cakes from their fans. But the highlight is the karaoke which made the boys even more excited.

For this special day, Seventeen set aside their idol image and let out their hyperactive side singing and screaming creating a chaotic but festive atmosphere. The boys started the karaoke party by singing Big Bang's "Bang Bang Bang" and despite the chaos, the boys didn't disappoint with their outstanding and smooth singing!

Meanwhile, they also showcased each teams' reversed skills where you can hear rapper line's ballad singing and vocal team rapping! Enjoy the video below: They also sang Taemin's "Press Your Number",IOI's "Pick Me",H.O.T's "Candy", Taeyang's "Eyes, Nose, Lips", Outsider's "Loner" and more!