答案

I believe so. There are some reasons. Firstly, they introduce positive concepts to the public. Take Michael Jackson for example. He was a black, good at music and dance. His songs and dances fascinate the whole world. And as a minority in America, he worked really hard for human rights and world peace, by compositions and charities. Secondly, they push world fashion. Take Taylor Swift for example. She is a typical American girl, gifted in country music, but longing for fashion and make-up. The world is her stage where she demonstrates the public, not only her musical talent, but talents in fashion.