Paparazzi are photographers who follow famous people — film stars, singers, princes — and take pictures they can sell to newspapers and websites. They are not the photographer a star invited to a show. They wait outside restaurants, chase cars, and try to catch someone looking messy, in love, or angry, because those pictures sell. The word is Italian: paparazzo is one such photographer, paparazzi is more than one. Though actually English speakers very often say paparazzi even for one person, and almost nobody uses paparazzo in ordinary talk. The word feels informal and a bit harsh; people use it when they want to complain that the cameras will not leave someone alone. A news photographer at a press conference is not paparazzi. The difference is the hunting, and the selling of private moments.