With an average age of just 9.75, the youngest girl group in Korea�made their official debut on the December 26th episode of "Y-Star Live Power Music". Yoon Jung (10), Hye In (10), Yuri (11), and Chae Young (12)�pre-recorded their stage for their debut song, "Pinky Pinky", on December 18th. Y-Star's PD,�Lee Dong Suk, praised Girl Story as�being well received by the audience; however, he admitted that he felt unnerved at watching such young girls perform on stage. Despite having an anti-fan cafe (with members numbering over 20k and counting), and a likely sanction on free-to-air TV performances, their agency is unconcerned. They plan on promoting the group through cable channels instead. Girl Story will begin full promotions when their album, "G-Story", is released on the 28th.