They are performers. They can put on a great show that pleases their audiences. The synchronized dances of the North Koreans are awesome. You are right about the stars like Lady Gaga and Bono and Bruce Springstein, and their performances would be eagerly anticipated. They don't need subsidies. . You just have to have a clause in their contract that they won't be paid if they say anything that is contrary to the Party line.
3 wounded in apparent stabbing in Jerusalem Gay Pride parade, Channel 10 reports (Haaretz)
from the article: Prominent film, television artists join boycott of West Bank arts center