Starship Planet including MONSTA X, Boyfriend, Cosmic Girls, Jung Se Woon, and more party for 'Christmas Day' teaser

The lineup includes K.Will, Soyu, Mad Clown, Boyfriend (including Donghyun, who was absent in the teaser image), JungGiGo, Yoo Seung Wo, Brother Su, MONSTA X, Cosmic Girls, #GUN, Mind U, Duetto, Jung Se Woon, and Lee Gwang Hyun. 

Check out the teaser video above.