Yoona thinks she’s the prettiest in all of Girls Generation.

On a recent episode of KBS 2TV variety program “Sang Sang Plus,” Yoona, Sunny, and Tiffany of Girls Generation appeared as guests.

In one segment, the guest had to answer true or false to a series of statements. One statement was, “Among girl group members, I’m the prettiest.” Yoona answered yes.

Sunny immediately said, “[Yoona] has a big smile, and while eating, she’ll show the food in her mouth. She’s just like a young elementary school boy.”

Yoona,responded, “All my nicknames are Aga-Yoon (my dear/pretty Yoon), Lim Cho-ding (Lim elementary school student), Nam Cho-ding (male elementary school student), and HimYoona (strong Yoona).”

When asked who she thought was the prettiest in all of the girl groups, Yoona answered, “I think Sulli of f(x) is cute.”

I think seohyun's the perettiest.