On the December 10th episode of KBS 2TV's 'Invincible Youth 2', SISTAR's Bora along with f(x) member Amber spontaneously composed the "Invincible Youth Song" on the spot. On the episode, the G8 members invited the people of the village to their newly built dormitories and spent some quality time with them. The members spent a busy day picking up their guests and getting the food ready to serve the elders. But even in the midst of their hectic day, Bora and Amber managed to compose the "Invincible Youth Song". Amber played a melody on her guitar and hummed along, and Bora thought up some lyrics that went well with the tune and thus, "Invincible Youth Song" was born. The song is easy to sing along with and has a refreshingly upbeat melody. The members performed it for the first time ever, earning the high praise and cheers of the village elders. Noh Joo Hyun from Invincible Youth's first season also made a special feature. Source & Image: bntNews via Nate