Singer Crush and Red Velvet member Joy have delighted fans with an unexpected musical collaboration. The couple, who have been publicly dating for more than five years, released a live duet video of Crush’s latest song, “seesaw”, giving audiences a glimpse of their vocal chemistry and comfortable bond.
Crush shared the video on his social media accounts and YouTube channel on November 11, just in time for Pepero Day celebrations in South Korea. Although the two kept their faces away from the camera, their voices and a special appearance by Crush’s pet dog made the performance an instant talking point among fans.
Crush and Joy Sing ‘Seesaw’ Together in Surprise Live Video
The video, titled “seesaw Live with JOY”, features Crush and Joy sitting beside each other as they perform the song. Rather than revealing their faces, the clip focuses on their upper bodies, their singing and their relaxed interaction. Joy can be seen holding Crush’s pet dog, Duyu, throughout the performance, while Crush sits beside her.
The two take turns singing their respective parts and move along to the rhythm, creating a warm and intimate atmosphere. Their contrasting vocal tones blend smoothly, giving the track a different feel from its original version. The simple setting and natural presentation also make the video feel more personal than a conventional promotional performance.
Fans Had Been Waiting for the Couple’s ‘Seesaw’ Collaboration
Crush has been sharing live versions of “seesaw” with different artists as part of the song's promotional content. Fans had been hoping that Joy would eventually join him for one of these performances, making the surprise duet particularly special. The response was enthusiastic, with viewers praising the pair's vocal harmony and asking them to release an official duet.
Some also found Joy holding Duyu especially adorable, while others celebrated the couple's easy chemistry even though their faces were not visible. The November 11 release added another layer of excitement because it coincided with Pepero Day, a popular occasion in South Korea when people exchange chocolate-covered biscuit sticks with friends and loved ones.
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‘Seesaw’ Is Crush’s Latest Release Featuring IU
Crush released “seesaw” as a digital single on October 21, 2026, with IU joining him as the featured artist. The song explores the awkward and sometimes complicated process of falling in love, using its distinctive sound and lyrics to capture the ups and downs of a relationship.
Crush has been actively promoting the track through collaborations and live content with other singers. Joy's participation brings a different dimension to the series, especially given their real-life relationship and musical history. The duet is a live performance of the song rather than an announcement of a separate official collaboration or new single featuring Joy.
Crush and Joy’s Relationship Began With a Musical Collaboration
Crush and Joy first worked together in May 2020 when Joy featured on his single “Mayday”. Their professional collaboration eventually developed into a relationship, which they publicly confirmed in August 2021. Since then, the two have continued their respective music and acting careers while maintaining a public relationship.
Joy remains active as a member of Red Velvet and has also pursued solo music and acting projects. She is currently appearing in the TVING drama One-of-a-Kind Romance, which premiered on November 9, 2026. Meanwhile, Crush continues to release music and collaborate with fellow artists.
Final Take
Crush and Joy's “seesaw” live duet gave fans a musical surprise that combined their vocal strengths with a glimpse of their everyday comfort together. From Joy holding Duyu to their smooth harmonies, the understated video offered a different charm from the song's original version. Fans' enthusiastic response has also sparked hopes of hearing the couple collaborate on an official duet in the future.
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