What kind of music do wealthy people listen to?

I am just wondering what the wealthiest people in the world tend to listen to. I realize that everyone is unique and has different preferences, but what are some general tendencies among the wealthy. Also I am wondering if there is some overlap of music preference between various persons of great wealth. In my mind, wealthy people are like Mukesh Ambani, Bill Gates, Lilian Bettencourt, Warren Buffet, Sam Walton, etc.