Four child actresses have teamed up to form a new girl group called, Girl Story. Comprised of members Yoon Jung (10), Hye In (10), Yuri (11), and Chae Young (12), these girls rocked a successful debut stage on December 18th's " Y-Star's Live Power Music". Girl Story sang their debut title track, "Pinky Pinky" (which came with a very cute choreography), and got to share the stage with sunbae singers like T-ara, SISTAR, Younha and more. Y-Star's Lee Dong Suk PD said, "They didn't get nervous like real child actresses, and did well. After two rehearsals, they quickly adjusted to the stage. The audience liked them too." Their recorded performance will be aired on the 26th and they will begin full promotions when their album "G-Story" is released on the 28th. We'll upload once we grab a video of their performance, but in the meantime, check out their teaser video from a little ways back! Source: Asia Today via Nate