MBLAQ members G.O and Mir lent their voices for the OST for Channel A's new drama "K-Pop Ultimate Survival."

G.O and Mir released their OST song "I Already Knew", a mid-tempo track that showcases the two idols' powerful vocals. How the OST will be fit into the drama will be revealed in the pilot episode, airing on March 19th.

"K-Pop Ultimate Survival" is about the episodes that surround idol stars. In the drama, actress Go Eun Ah will play a pianist tomboy who dreams of becoming a hip hop dancer. She has to dress up like a man and pose as a male idol to achieve that dream.

Other than Go Eun Ah, the cast includes, Park Yoohwan, ZE:A's Kevin, Kwak Yong Hwan, Eunjung from Jewelry, Park Hyo Joo and Hong Kyungmin.