North Korean leader Kim Jong-un has agreed to hold summits with South Korean President Moon Jae-in and US President Donald Trump.
He met Chinese President Xi Jinping in Beijing last week during his first overseas trip.
The third inter-Korean summit - there were also meetings in 2000 and 2007 - is due to be held on 27 April. No date has been set for the US-North Korean summit.
Meanwhile, the US and South Korea have begun their annual military drills, which have been scaled down compared with previous years as both countries prepare for talks with North Korea.
In the past, the drills have infuriated North Korea but correspondents say that this time Pyongyang is keeping relatively quiet. Mr Kim reportedly told visiting South Korean officials that he understood that the exercises had to go ahead.
The musicians set to perform in Pyongyang include:
A five-member girl group, Red Velvet headlined at the Pyeongchang Games this year.
The popular quintet who first formed in 2014 are still seen as relative newcomers, but have already managed to scoop up their fair share of awards.
They have also got a large following on social media, with some 4.5 million followers on Instagram alone.
A member of undoubtedly one of Korea's most famous K-pop groups, Seohyun made her music debut in 2007 as a member of the all-female Girls' Generation.
The group shot to stardom in 2009, making Seohyun one of today's most recognisable K-pop singers.
In February, the 26-year old performed alongside North Korea's 137-strong Samjiyon Orchestra, which was part of North Korea's art troupe during the recent Winter Games.