Many fans are concerned over pictures of f(x)'s Sulli, which show dark circles under her eyes. On the 28th, a netizen uploaded a picture of the young idol with the title "Long straight hair Sulli, extreme dark circles." The pictures show Sulli looking pale and very tired. Her straight hairstyle also adds to her sedate expression. Netizens have commented, "She looks so exhausted!" and "I feel so sorry for her! She really needs a rest." Sulli has been very busy with the rest of the group promoting their single NU ABO and it looks like the schedule is taking its toll on her. We all hope she gets the rest she needs.