On the most recent episode of Invincible Youth, KARA's Goo Hara proved that she indeed has a 21-inch waist. f(x)'s Victoria got help from a student at a nearby high school last episode so she promised to visit the school later. The girls kept their promise and visited the school. While entering, Goo Hara decided to go through the railing instead of the main entrance. Instead of climbing over, she went under it. There was a small amount of space but she still nudged her way in. It's surprising to me that she has so much energy.