IU's "Good Day" practice video has just been released! On June 8th, Loen Entertainment uploaded the special behind-the-scenes video of IU on its official YouTube account. In the video, IU shows a variety of facial expressions while performing the cute choreography. From her dancing to her facial expressions, her hard work shows through, making it seem as if she's performing on a real stage. Netizens said, "IU does look a little tired", "She looks cute dozing off", and�"She's practicing really hard". Source: Newsen via Nate