Notorious dancer, Poppin HyunJoon, finally debuts today as a singer, along with four hand-picked trainees to make up the project group, A-Force. With all the debuts and comeback lately, you have to admit this one does stand out a bit. Besides the fact that Poppin HyunJoon will not only be showcasing his dancing skills but also his vocals on stage, the group consists of one guy and four girls (Surin, Victoria, Eun Byul, and Sooah). We all know Poppin HyunJoon has the dancing part down and the ladies have experience under their belt, but did you think the mixed quintet brought the force today on Music Bank? Check out their performance of their debut single, Wonder Woman, below and judge for yourself. Many thanks to Jheane1807 for the video.