This map shows the most popular artist in every country
It is not one world. While there are some artists that transcend borders, oceans, language, and culture, not everyone is embraced equally by everyone.
Liberty Games did some research and came up with this map that shows the most popular artist in countries around the world. (For a better look, go here.)
What about the most popular song? (Embiggen here.)
Then we have the most popular classic rock artists. (Blow it up here.)