As the main part of this thread is going round in circles & disappearing up it's own arse I thought I'd just add a clarification to this comment

'One more small thing...no singer of any musical genre, to my knowledge, has ever actually changed anything. The "Bono" Syndrome I believe it's called.'

Obviously very few things ever get changed by one person or one action, however the Bono thing is interesting. Politicians generally are suckers for seeking "credibility" or "coolness" and Bono & others are on record as saying that what they can do is use their perceived celebrity to bypass the normal channels you have to go through before you get access to the real decision makers, enabling them to push issues they are concerned with direct to those that can make the difference. Campaigns like "Make Poverty History" would never have had the same access to politicians without the "celebrity" element.

It's also a lot easier for a politician to change their stance if they've been "convinced" by a high profile campaign promoted by "celebrities" than if the same is being supported by rival politicians. If a rival leads a campaign then any decision to support said campaign, is viewed as a victory for that rival - so a professional politician would be reluctant to agree regardless of the merits, but this is not a problem if its a Bono or Geldof fronting it.

In a similar way politicians can also use campaigns lead by "celebrities" to generate massive non-party-political support & publicity to pressure and cajole politicians from other countries to agree to support an issue. The Live8 concerts & Make Poverty History campaigns were just such a thing, with Tony Blair and others collaborating with the campaigns to generate public pressure on leaders of other countries to support their political aims.

So while 'no singer of any musical genre, to my knowledge, has ever actually changed anything' they can help to enable change which would be much more difficult to achieve through purely political processes.