Fans were treated to a memorable collaboration as IU took the stage with DAY6 to perform their hit song "Congratulations."

DAY6 made a special guest appearance on IU's 'Palette,' where they sat down with her for an in-depth conversation about music. During the episode, the artists treated fans to a special performance, creating a buzz of excitement with their collaboration.

Korean netizens and fans expressed their excitement and joy in a popular online community. They commented:

"I love this."

"Thank you for this collaboration."

"They are so good."

"Congratulation is the best song."

"This collaboration is so good."

"This is so good."

"This gave me goosebumps because it was so good."

"It sounds more sad but it's so good."

"IU is the best."

"IU x DAY6. IU is so good at singing."

"The vocals together is the best."

SEE ALSO: DAY6 sells out stadiums, now heads to Gymnastics Arena for encore concert