T-ara along with Co-ed recently appeared in MBC's Radio Star.
When they topic was brought up about T-ara's new member, they explained why she was added into T-ara.
MC Yoon Jong Shin asked them, "Why did you guys add a new member?" and T-ara answered with "Well Ryu Hwayoung is 18 years old, so Jiyeon is still our youngest. Our CEO wants T-ara to have a lower average age!"
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Source: Newsen
Written By: Jeonwon
Translation By: *YANiPOPO* @Tiaradiadem.com