Mighty Mouth has finally made their comeback on today's episode of Mnet's 'M! Countdown'! For their latest track, "Fiesta", the boys have combined a fun Latin flavor with an exciting club beat that's surely to become one of the biggest hits of this summer. Sure enough, their album's theme is, "Throw away the worries and stress that come from the heat and your daily life and just go out and play!" The duo teamed up with composer A.T. from the production team 'EAR ATTACK' for this sampling of Japanese DJ Fujisawa Shiho's "A Note From Sky". Rookie singer Soya from Mighty Mouth's last single, "Tok Tok", is also back again for a vocal featuring. Check out their comeback stage below! Source: MyDaily via Nate