After a long hiatus, the 4minute girls are back to become a hot issue on Mnet's M! Countdown. Whether it's the light and flirty song, "Heart to Heart", or the powerful and unique feel of "Mirror Mirror", the girls are definitely showing an upgraded twist to their charismatic color. "Heart To Heart" blends the members of 4minute's individual tastes into one energetic track that captivates listeners with the energy of spring, while "Mirror Mirror" shows the mature transformation of the girls as they head into their 20s with their unique sound and an energetic beat. Check out their comeback stage below!