IU's Appearance on Hidden Singer 2 Sparks Debate Over Shannon's High Notes

The 2013 broadcast of JTBC's 'Hidden Singer 2' featuring IU generated significant discussion among viewers at the time. The episode became a focal point of controversy, particularly regarding an impersonator singing the three-octave high note from IU's hit song 'Good Day' and the participation of certain contestants identified as agency trainees or lesser-known idol group members.

Some bloggers criticized the IU episode as the "worst Hidden Singer ever," noting that the impersonators' skills were below expectations and that a specific trainee received more attention than IU herself. They expressed disappointment when Shannon, not IU, performed the iconic three-octave high note in 'Good Day,' effectively making IU and other contestants backup vocalists. Concerns were also raised about the show's original intent being diluted by the appearance of contestants who had already debuted or participated in audition programs, such as Kim Yeon-jun from the girl group Two X.

Conversely, other bloggers positively reviewed Shannon's performance, highlighting her perfect rendition of IU's three-octave high note, which reportedly surprised even IU. MC Jun Hyun-moo's witty hosting and reactions to Shannon also provided entertainment for viewers, leaving the IU episode as a memorable, albeit controversial, installment of the series.