Celebrity Sell Out: Jennifer Aniston, John Mayer, Demi and Ashton in Twitter wars

LONDON - Twitter has many celebrity fans, Stephen Fry and Jonathan Ross being the stars of the Twitterati, but musician John Mayer appears to have become so obsessed with the micro-blogging service that it has cost him his relationship with 'Friends' star Jennifer Aniston.

According to reports, Mayer told Aniston that he hadn't returned her calls while she was away promoting the film 'Marley and Me' because he was too busy with work.

But Jen caught him out when she spotted he wasn't too busy to be making regular Twitter updates.

Over at the house of Ashton Kutcher and Demi Moore the pair have also been having Twitter fun as he snapped his wife's rear and then immediately posted up on the micro blogging service.

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