On the October 24th episode of KBS 2TV's 'Star Interview', KARA's Jiyoung talked about her friendship with f(x)'s Sulli and how they first met.

Jiyoung began, "For the two years following my debut, I didn't have any celebrity friends. Then a girl group named f(x) debuted. We were promoting 'Mister' at the time, and we ended up using the same waiting room. I approached her first and said, 'Hello, [I was also born in '94]. Let's be friends.' She wanted to be close with me too, and that's how we became friends."

Sulli added, "I think Jiyoung has been there for me through my hardships more times than I've been there for her. I'm always whining, 'Hurry up, I want to see you soon. Let's meet right now.' Then Jiyoung says something like, 'Okay, stop pestering me, we'll see each other in 30 minutes.' I'm really thankful that she's always there for me whether I'm happy or sad. I'm grateful to have her as a friend."