Hmm...opera Charlotte or the new version of herself? Do you have a mobile phone which can take a recording - just a voice recorder function? It's not great quality but you get the idea of what you sound like. If you've ever heard a recording of yourself before you'll notice it's quite different to how you hear it usually because the sound travels a different way. Best thing to do is find someone you don't know or who won't kiss your ass and sing for them - that way you'll get their honest opinion and recommendation for which songs to go for. Even if they agree with everyone else so far it's handy because then you'll have a rough idea of how the judges will receive you rather than your friends' opinions.