IU, who made her comeback yesterday on 'M! Countdown,' took a lovely picture of herself backstage, which was then uploaded onto Twitter by lyricist Kim Yi Na.

In the picture, IU looks pure and sweet as she looks into the camera with a small, delicate smile.  The floral dress, pearly jewels, and refined hairstyle all add up to a very vintage and classic look made complete by the small beauty mark on her cheek.

SEE ALSO: IU gets locked in her dressing room backstage on 'M! Countdown'