Recently, a picture of Wonder Girl's Yubin, After School's Uee and Secret's leader, Jun Hyosung, has been floating around the internet. If you didn't know, these three girls used to be trainees who were about to debut as a group called Oh-Sonyeo (Five Girls). They were training and practicing together for 2 years until they separated at the last minute. Looking at these pictures, they look pretty much the same, except they look much younger and have chubbier cheeks. Although they are now separated, the girls are still close with one another. Yubin in the past encouraged Uee, and she even introduced her on MBC's Introducing a Star's Friend. Uee commented:

"During Oh-Sonyeo, my passion for becoming a singer grew and I met a friend named Yubin. When I met her during her activities with Wonder Girls' So Hot, I was thankful because she was the same as always. I too, want to stay as the same Uee in front of my friends."

"Although I was afraid after Oh-Sonyeo's breakup, I believe I matured after feeling the pain. I still keep in touch with the Oh-Sonyeo unnies. Because I spent 2 long years with them, even when I see them now I still feel very close to them."