 Some countries do not use the term while an ambassador is in the home country, as the office holder is not an ambassador there; for example, a Canadian ambassador while in Canada is not generally addressed as ambassador, although they may be referred to as "Canadian ambassador to ..."; that is, with reference to a specific job function; the person is addressed or styled as ambassador only while holding such office.In a less formal sense, the phrase is used for high-profile non-diplomatic representatives of various entities (rarely states), mainly cultural and charitable organizations, often as willing figureheads to attract media attention; for example, film and pop stars make appeals to the public at large for UNESCO activities (see UNESCO Goodwill Ambassadors), sometimes during press-swarmed visits in the foreign country.Public figures are sometimes nominated or invited to endorse as ambassadors, brand ambassadors, and Goodwill ambassadors such as the Drug Addiction Campaign, Neat and Clean Environment Mission, or the Space Peace Campaign.