Celebrites Affected by the Media?

[Aj]

For the ones shattered by the media I'd say you'd have to include the Britney Spears for her breakdown a while ago (shaving her head, etc) because of the pressures of celebrity lifestyle (media attention, especially photographers following her everywhere could be cited as a prime reason for why it can be so stressful.)
Mel Gibson may be another - he was recorded by his wife or something making racially questionable comments and abusive ones - while those in themselves should have broken his career, it is reasonable to say that the media was the reason for it being wide spread knowledge and Mel became remembered for it.

For the ones who have gained would probably be the C-lister celebrities, think Paris Hilton, etc. socialites who are merely famous for having spelt with someone, or something along those lines; they only maintain their status because the media pays them attention.
It's quite hard to think of someone who boosted their status through positive press without it being pre-arranged with media to take photos... perhaps Christian Bale flying to visit the victims of the cinema shooting? He did it without causing a major field-day, relatively low key and private, but photos were taken and spread through media streams.

Sorry couldn't be more help that's all I could think of.