Rookie female group Miss A has proved to be an up and coming force in the world of kpop! With an explosive debut, and a chart-topping single, this fierce foursome is already being considered a force to be reckoned with. Unfortunately, all good things must come to an end.� Today, the girls are performing their debut single, Bad Girl Good Girl, on their goodbye stage for Music Core! Can't wait to see what the girls have in store for us in the future. Check it out below!