A perfect match of celebrity with ad sensibility, as what-me-worry? Jerry Seinfeld uses his American Express card to survive the rigors of falling overboard at sea (it's actually a remake of an AmEx spot from the '70s). Company ad VP Peggy Mitchell-King says that Seinfeld—a Cardmember since 1980—"provides a lot of input into the creative process, often improvising and adding his keen sense of irony."