On December 31, 2025, ILLIT member Wonhee stole the spotlight at the MBC Gayo Daejejeon. The KPop star took on IU’s iconic 2010 hit Good Day, a song famous for its triple high note climax and closely tied to IU’s legacy. Choosing this track was no small move, especially for a young artist. Fans were instantly curious to see how Wonhee would handle this challenging performance and how IU would respond.
After the moment spread across social media, IU herself chimed in with a light-hearted comment. Fans asked the singer about the cover, and she did not hold back her praise. IU complimented Wonhee’s vocal tone and expressive facial performance, making it clear she enjoyed her work.

“I saw it!! Both her singing and her facial expressions were really great.”
Good Day, released in 2010, continues to be a favorite choice for performers, proving its legendary status. With IU’s positive feedback adding extra shine, Wonhee’s stage became a signature moment to close out 2025, showing how classic KPop songs can get a new life by inspiring new generations of idols.