When you are young you change anyway so its not 100% easy to say that any charge was a marketing ploy although i wouldnt be surprised if it was. Although compared to some pop music she does seem to be responibly geniune.
If i could just pick up on what kronas said about most artists not writing their own songs i would like to make a few comments on that. First of all most artists DO write their own songs. Its just those bands that dont write their own songs seem to be on the public stage the most.
However even that is changing, recent boy bands (busted, McFly) are being given guiters to try and give them more credibility which has become a required trait to be succesful as the young audience like to appear to be listaining to 'real' and 'quality' music. Although the only problem is that these bands write meanless and stupid lyrics. While the music is manufactured to sound additive.
Thankfully bands such as U2, Coldplay and so are still around also due to online downloads older music is selling a lot more to. I discovered Dire straitrs thanks to the west wing & iTunes
