Crush and IU team up for first official collab, "Ppigdeuduk" drops October 21

Crush's first new music in 14 months

Crush (신효섭) drops digital single 삐그덕 (Ppigdeuduk) featuring IU on October 21, 2026 at 6 PM KST across online music platforms. His agency Pineation confirmed the release on October 16.

The single marks his first new music since the mini-album FANG (팽) in August 2025 — a gap of roughly 1 year and 2 months.

First official track together

This is the first time Crush and IU have released a song together. The two have a documented history: in 2019 they each appeared as a guest at the other's solo concert and performed on stage together, and in 2022 Crush guested on IU's music talk series IU's Palette (아이유의 팔레트). (A collab that's been seven years in the making, basically.)

On October 15, Pineation posted a teaser video to its official SNS containing vocal snippets from both artists alongside footage of the two working together in the studio. A teaser image followed on October 16, showing two silhouettes facing each other against a warm sunset backdrop; text at the bottom reads 'CRUSH', '삐그덕', 'SEESAW Feat. IU', and '2026. 10. 21(WED)'.

What to watch on release day

The track is credited as 삐그덕 (Feat. 아이유) and releases October 21 at 6 PM KST. Given IU's consistent chart presence and Crush's R&B fanbase, the first-week streaming numbers will be the immediate data point to track.