what is the most common business of a celebrity

In India, bollywood film stars are inn mann y businesses apart from films . like actors Shahrukh Khan, Aziz Mirza, Juli Chawla have a production company that produces films, then actor Suniel shetty has hotel business apart from entertainment company that's into films, shows. Then many celebrities are into businesses like fashion, health and beauty businesses and so on.

Actor Paul Newman drives, owns and invests in a lot of race cars. He also owns a condiment making company whose profits go 100% to charity.