This year's 24 hour TV main hosts' performance
https://www.bilibili.com/video/BV1uT4y1L7hq
5 songs medley consists of :
Matsuda Seiko - Aoi Sangosho
aiko - Hanabi
Suga Shikao - Manatsu no Yoru no Yume
Princess Princess - Sekai de Ichiban Atsui Natsu
Aimyon - Marigold
Each of the hosts' chose the songs to sing in the Natsu no Masterpiece medley
Masuda chose the 1st song