David Gauntlet Representation Theory: He says that that people's personal identity are made up of the media that those people use. Zoella's fans use her media text (Her youtube videos) to discover and build their personal identity.
Clay Shirky End of the Audience theory: He says People use the internet to respond to media texts and creating their own fan media. Zoella's fan can respond to her media texts by commenting on her videos. Some of her fans think she is their friend, and may be obsessive. Her fans have made a twitter fan account that consist of updates oh her posts and their feeling towards her.
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