As Mid-day.com had reported earlier, the first day of BTS rapper Min Yoongi aka Suga's D-Day concert in Seoul was held on Saturday. The K-pop group's fans aka BTS ARMY ensured all 7 members of the group trended on Twitter. Fans hoped for a surprise that other members of the group would attend the concert, except for Seokjin aka Jin and J-Hope aka Jung Hoseok, who are currently fulfilling their mandatory military service. 

Turns out, there was a surprise, but of a different kind! Psy joined Suga on stage to perform their hit number 'That That.' K-pop groups Enhypen and LeSserafim were spotted attending the concert.