Celebrities are one of the best ways to promote companies products, set different trends, and voice opinions. Wherever you go, you will constantly hear about popular culture and what is new with whom. These people have tremendous influence on our world's society more than you could even imagine. Celebrities can have a positive influence on youth. In fact, they can serve as role models. But famous singers, actors, and other celebrities can also provide unhealthy examples. In particular, celebrity influence on body image and substance use is often detrimental to teen mental health.