Kim Na Yoon, past contestant of SBS' "K-pop Star," became a family member of SISTAR.

Starship Entertainment, the agency of SISTAR, K.Will, and Boyfriend, said "We officially made contracts with Kim Na Yoon from SBS 'K-pop Star' and accepted her as one of our trainees" on the July 9.

On this day, Starship Entertainment posted on their Facebook, "We introduce you to the new member of our family Kim Na Yoon. She has been chosen as our newest trainee. We believe that she will need much time and effort, since she is still a little girl filled with passion. Please keep watching as Na Yoon becomes a good artist."

Kim Na Yoon, from California, has bought much attention for her cute face and superior keyboard skills in "K-pop Star,' and was ranked 9th place.

Photo Credit: Starship Entertainment