[MelOn Premiere Showcase] I.O.I(아이오아이) _ Knock Knock Knock(똑똑똑)

[MelOn Premiere Showcase] I.O.I(아이오아이) _ Knock Knock Knock(똑똑똑)

Check out the live clip of "Knock Knock Knock" on Melon Premiere Showcase :)

▶1theK FB : http://www.facebook.com/1theK
▶1theK TW : https://twitter.com/1theK
▶1theK G+ : https://plus.google.com/+1theK