f(x)'s Sulli revealed a feature complex insecurity she has.

Sulli who appeared on Tuesday's SBS "Strong Heart" broadcast was asked, "Do you have any feature complexes of your appearance?" replied, "The truth is my small eye."

She continued, "My left eye is actually smaller than my right eye. That's why my fans often misunderstand me to be winking when I'm smiling, but my eye just actually closes."

SHINee's Minho also stated, "My chin feels like its getting shorter, making it my complex," causing a wave of laughter on at the studio.

Actress Kim Ji Won who was also on the show stated,"I have a complex about my ears. They look like a donkey's ears. They're sharp."

In related news, the episode featured cast members of "To The Beautiful You" such as Sulli, Minho, Lee Hyun Woo, ZE:A's Kwanghee, Hong Suk Chun, Lim Ho, and Hyunmi.