After the 2-hour-plus concert, the North Korean leader and his wife shook hands with the pop stars and took pictures with them, the pool added.
The concert marked the first time in over a decade that South Korean musicians have traveled to North Korea, as relations between the two countries have thawed ahead of a groundbreaking summit of the leaders of the two countries.
In video footage of the show, Kim Jong Un stands up, claps and waves to a crowd of applauding concert-goers below him.
Also in attendance from North Korea were Kim Yo Jong, Kim Yong Nam, Choe Hui, Ri Son Gwon and Kim Chang Son, according to the pool.
K-pop girl band Red Velvet, starlet Seohyun of Girls' Generation, singers Cho Yong-pil and Lee Sun-hee, and rocker Yoon Do-hyun were among those expected to travel north of the demilitarized zone (DMZ) for two concerts in Pyongyang.
Yoon, who also performed in Pyongyang in 2002, recently explained to CNN his reason for performing.
"We go as something similar to a cultural mission and do the performance diligently. If that moves North Korean citizens' hearts and the two relationships get a little better through music, I think that's what we can do," he said.
Separately, the South Korean taekwondo team