Recently, IU was seen playing with a blue-colored substance on her Instagram. On July 30th, Korean singer IU uploaded a video of herself playing with a blue-colored substance called 'slime', which has been getting popularity lately in Korea. 이지금(@dlwlrma)님의 공유 게시물님, 2017 7월 30 오전 1:57 PDT In the video, IU made a heart shape and put a fish toy on top of it. Her video has gained over 750,000 views. (Credit = 'dlwlrma' Instagram) (SBS Star)