Many people in Shanghai are sad. Shows by Japanese singers stop suddenly. One singer stops singing in the middle of her song. The lights go on and she leaves.
This happens to other shows too. A big music show and a game festival are also cancelled.
The people who plan the shows say there are "problems." But many people think it is because of politics. China and Japan are not happy with each other right now. They disagree about an island.
Fans are upset. They say it is not nice to the singers or the people who bought tickets. When countries are not friends, it can stop music and fun too.