The most unexpected songs an idol wrote for someone else ?

Name the most unexpected songs that an idol wrote for someone else (It can be anything, even if they wrote for foreign artists)

For me its these songs

• It's comming (Produce 101 Japan season1-themeseong) -> Dawn (Literally ex. PENTAGON, Hyuna's fiance,... ya know who)
• One Day (Produce 101 Japan season 2) -> Lee Daehwi (AB6IX's Daehwi, ex. WANNA ONE, Produce 101 season 2 winner wrote for Produce Japan...)
• OH-EH-OH (JO1) -> Hui (PENTAGON, he literally gave it to JO1 just cause he knows Ren)
• 5tar (A.C.E) -> Taemin (SHINee, like literally I just someday stumbled across the producer-list and his name poped up)