Richard Dyer's star theory argues that celebrities, or "stars", are constructed identities rather than real people. Stars have personas crafted for public consumption that differ from their private selves. They also usually have a unique selling point, like Michael Jackson's dance moves, that allows them to be imitated or parodied. Stars are sometimes constructed as exaggerated characters, like Lady Gaga, rather than resembling ordinary people, in order to appeal to fans who identify more with the character than a real person. Stars also represent social or cultural groups to help fans relate to them and adopt the star's ideologies, such as Meghan Trainor's lyrics about not being a "stick-figure silicone Barbie doll."