Jungle Entertainment's boy group M.I.B. ('Most Incredible Busters') finally made their long-awaited debut on tonight's 'M! Countdown' with their dynamic song "G.D.M." ("Girls Dreams Money"). The foursome caused quite the stir in the music industry by releasing individual solo MVs as 'spin-off' promotions, allowing the public to familiarize themselves with each member. 5Zic, Cream, SIMS, and Kang Nam's talents all flowed onto one stage tonight, and their infectious energy and charisma drew loud cheers from everyone in the house. Check out their debut performance below!