Absolutely nothing.

Everyone knows Sooyoung has incredibly long and slim legs, but did you know they need absolutely no photoshop? She’s got such a perfect model figure with her lanky limbs and tall height, that her ‘unedited’ and ‘edited’ photos don’t look different at all.

As the tallest and thinnest member of Girls' Generation, she’s often called the model of the group, and this set of pictures just seems to prove that point.

Although some may question if Sooyoung is too thin, but the fact is that the idol has revealed that no matter how she tries, she is just not able to put on weight like many of us can (err..lucky us?).

Source : allkpop