A trio of songwriters are suing HYBE over claims that the BTS smash hit was "copied in very large part" from their earlier track.

BTS perform on stage during comeback concert at Gwanghwamun Square on March 21, 2026, in Seoul, South Korea.

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A new lawsuit claims that BTS’s chart-topping smash “Swim” stole key elements from an unpublished demo by three little-known songwriters.

In a case filed Wednesday (July 8) that was obtained and first reported by Billboard, Steve Cooper, Jon Sandler and Greylyn Johnson claim the BTS hit — which debuted at No. 1 on the Hot 100 this spring as the lead track off ARIRANG — has many “substantial similarities” to their own song of the same name.