Unpretty Rapstar 2 – Don′t Stop
I was not a fan of the show but the second season got an impressive cast (Gilme, An Soo Min, Yubin (Wonder Girls), Kasper, KittiB, Heize, Ash-B, Truedy, Hyorin (Sistar), Yezi (Fiestar), and Sua)… And the intro MV is quite good. For more information, this website will follow everything about it I think.
Same song, on stage :