On September 12, The Chainsmokers held a concert at Jamsil Arena in Seoul with 8,500 fans occupying the concert hall.
During the concert, BTS showed up on stage and performed The Chainsmokers' hit song 'Closer' together.
BTS said, "We were invited by The Chainsmokers. We are glad that everyone's enjoying the concert."
Meanwhile on September 11, a source revealed that The Chainsmokers will collaborate with BTS on BTS' upcoming track 'Best of Me' in its new album 'Love Yourself 承 Her'.
(Credit = Hyundai Card/SBS funE, 'sonymusickorea' Facebook)