As many as 160 K-pop musicians could take part in the concerts; such top musicians as Cho Yong Pil, the five-strong Red Velvet female band (except for one of its members, Joy, who didn't join her bandmates due to scheduling conflicts with the drama she's now starring in and was harshly slammed on social media for her being absent) and the solo singer Seohuyn will perform for their North Korean neighbors.
Seohyun reportedly sang a North Korean song, and the artists together sang a song calling for Korean reunification.
Kim shook hands and took photos with the Seoul stars backstage, saying inter-Korean cultural events should be held more often and suggesting another event in the South Korean capital this autumn, pool reports said.
Among those due to perform are Cho Yong-pil, the influential 68-year-old singer who performed a solo concert in Pyongyang in 2005, and Choi Jin-hee, 61, who took to the stage in the North in 1999, 2002 and 2005.
Still, some South Korean performers were evidently deemed too risqué. Their trip comes before Kim is to meet with South Korean President Moon Jae-in at a border village on April 27 and with President Donald Trump in May in separate summits.
The singer, unfortunately, is unable to attend either of Red Velvet's Pyongyang concerts (scheduled for Sunday, April 1 and Tuesday, April 3) due to scheduling conflicts with her TV show.More news: French troops in Syria would be 'invasion': Turkey
This year's drills feature fewer strategic weapons such as a nuclear-powered aircraft carrier, Seoul's military has said.
The group shot to stardom in 2009, making Seohyun one of today's most recognisable K-pop singers.
Before the concert, even the leader Kim joked: "There was so much interest in whether I'd come to see Red Velvet or not". The performance was delayed by two hours for "the convenience of more audience", Yonhap News Agency reported.
The 120-member group, including top girlband Red Velvet, flew from Seoul's Gimpo airport aboard a chartered civilian flight to Pyongyang via the rarely used direct air route between the two Koreas, as a rapprochement on the peninsula gathers pace. She had performed with the North's Samjiyon Orchestra in Seoul in February.
The theme of the joint concert will be "Spring is Coming", South Korea's Culture Ministry spokesman Hwang Seong Un said at a briefing in Seoul on March 27.
The delegation mixes K-pop, rock and other genres.
The stiffened crowd refused to respond to the athletes who motioned them to clap their hands to "Fire" - an intense electro-dance score peppered with rapid-fire rap delivered in both Korean and English.