According to Korean media reports on January 2, 2026, ILLIT's Wonhee performance created a strong effect on social networks.
The fact that a young artist chose Good Day - a song associated with IU's name to perform is always a big challenge, especially at the climax with three consecutive high notes that once became the "brand" of the song. Therefore, Wonhee's performance quickly attracted attention when it was widely spread on social networks.
With a clear voice and soft handling, Wonhee at the end of 2025 brings an emotional Good Day version, restrained in technique but still retaining the bright spirit of the original song. The facial expressions are also considered suitable, helping the overall performance become pleasant and close to listeners.
Notably, IU directly gave positive feedback on this cover. When fans asked about Wonhee's performance, the female singer did not hesitate to express her impression, praising both her singing voice and facial expressions of her junior. Although it was just a short comment, feedback from the song owner herself quickly attracted great attention from the fan community.
IU's praise is considered a valuable recognition for Wonhee, especially in the context that Good Day is one of the iconic songs of K-pop. Many viewers believe that being positively evaluated by IU is not only a personal motivation for Wonhee but also contributes to affirming the potential of the young idol generation in approaching and renewing classic hits.
Released in 2010, Good Day is still frequently chosen by young artists to perform. The fact that the song continues to receive attention, along with positive feedback from IU herself, shows the persistent vitality of this work in Korean music life.
