Having completed her comeback round of performances on the three major music shows last week, IU continued with her comeback stages on the December 16th edition of M! Countdown. We all know that IU is one talented girl with solid vocals, but she has really made many take notice of her with her "Good Day" performances from last week. She also performed "The First Goodbye That Night", so get ready to be impressed by her once again! Bonus selca uploaded before the show.