Recently on an online forum, a photo of  "IU's mature backline," was posted, causing extra attention from internet users.

The photo was from the June 29 episode of KBS 2TV "Music Bank." IU was seen wearing a black dress with cute bear ears on her hair- revealing her usual cute image.

The change happened when she turned around while singing to reveal a rather womanly physique. Although she was famous for having a little girl's body, she now displayed another side of her.

Internet users commented, "IU is womanly, too" and "She looks mature now."