The music industry's business model is to produce stars. In order to do so, musicians producing music that fits into well defined clusters of factors explaining the demand of the majority of music consumers are disproportionately promoted. This leads to a limitation of available diversity and therefore of a limitation of the end user's benefit from listening to music. This paper analyses online music consumer's needs and preferences. These factors are used in order to explain the demand for stars and the impact of different online music services on promoting a more diverse music market. Categories and Subject Descriptors H.3.5 [Information Storage and Retrieval]: Online Information Services; J.4 [Computer Applications]: Social and Behavioral Sciences; J.5 [Computer Applications]: Arts and Humanities--Performing arts; K.4.4 [Computers and Society]: Electronic Commerce General Terms Economics, Human Factors, Management Keywords iTunes, MP3, Music, Peer-to-Peer, Stardom, V...