Solo singer IU made her official comeback with new song "Good Day" at Music Bank aired on 10th December.

After watching her LIVE performance,netizens left some positive comments on Youtube praising the 17 years old's girl awesome singing skills.

Many were unable to believe that she is able to reach such high notes since she is just 17 years old.However,we need a MR removed video to prove that she is an "CD -like" singer.

Anyway,check out her performance on Music Bank yesterday,did she impress you?