This exploration of modern endorsement advertising--paid or unsolicited testimonials endorsing a product--follows its evolution from a marginalized, mistrusted technique to a multibillion-dollar industry. Chapters recount endorsement advertising's changing form and fortunes, from Lux Soap's co-opting of early Hollywood to today's lucrative industry dependent largely on athletes. The social history of endorsement advertising is examined in terms of changing ethical and governmental views, shifting business trends, and its relationship to the growth of modern media, while the money involved and the question of effectiveness are scrutinized. The illustrated text includes five appendices that focus on companies, celebrities, athletes and celebrity endorsements.