Belting out "I like u oppa, what should I do" in her hit song, "Good Day," IU quickly rose to the top, boven of the lijst as the nation's volgende younger sister and was adored door many uncle fans. However, as she gradually made her way into appearing on variety shows, we were shocked to see that IU was not so child-like as she seemed. For one, IU does not have a cute, high-pitched voice that we all thought she would have. Actually, it's quite deep. And her unexpected commentaren such as, "When girls are rushing to go out, they sometimes only wash their bangs," shows that she has a hidden tomboy, easy-going, and surprisingly mature personality behind her baby face.