Super Junior's Siwon, TVXQ's Changmin, EXO's Chen and Baekhyun, Girls'Generations' Seohyun, SHINee's Minho, TRAX's Jay, J-Min, and Lee Dong Woo came together with many other artists around the world such as Katie Perry, David Guetta, and more, singing to John Lennon's "Imagine" for the new campaign titled, 'A Fair Chance for Every Child'.

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It looks like Siwon and Changmin were able to complete filming for the project before their military enlistments!

You can listen to their meaningful message in the clip above.