IU finally unveiled her highly-anticipated 6th mini-album, 'The Winning,' and fans were able to listen to all of her latest songs.

Among IU's newest songs, one song has garnered much attention thanks to an unexpected featured artist. "Shh" featuring NewJeans' Hyein has been the talk of various online communities as many K-pop fans are in awe of the young idol's vocal talent.

This collaboration was foreshadowed during NewJeans' appearance as a special guest on IU's YouTube talk show, 'IU's Palette.' During the show, IU expressed her admiration for Hyein's voice, particularly when she performed the track "Get Up," which left a lasting impression on IU and her audience.

With the track "Shh" featuring Hyein finally unveiled, Korean netizens love the newest track and have shared praise on various social media and online communities.

Korean netizens commented, "So crazy," "Hyein's vocal is so nice," "I love this song," "oh my gosh," "Hyein, I love you," "I want to hear Hyein's solo songs in the future," "Wow, this song is so crazy," "Hyein's vocal is so perfect for this song," "I get why IU fell in love with Hyein's voice," "Her vocal colo is so unique," "Just wow," "Wow," "I love 'Shh.' The song is so good, I'm going to cry," "Hyein's voice really has a unique voice,"  and "Hyein is so good at singing!"