Singer IU gained the attention of older male fans with a photo that shows her upgraded femininity.

IU wrote on her Twitter on Sunday, "En...end...today was really tiring... Even though it wasn't a great day, it's fun living!!!! Good night," along with a picture.

In the picture that she uploaded, IU is showing her long wavy hair and is looking at the camera with a fascinated gaze. She took off her cute little girl image and showed her femininity.

Internet users who saw the picture commented, "She went from a little sister, to a mature woman," "Upgraded beauty... She's becoming prettier," and "I'm happy as her uncle fan. Even just looking at her purifies my eyes."

Photo Credit: IU Twitter