Morwen, yes, I think a lot of the kids who aren't very familiar with "Over The Rainbow" in its original tune & lyrics really do think Iz's 'version' or Eva Casidy's twisting of the melody is the real song. They may have seen The Wizard of Oz once or twice, but that probably doesn't make up for hearing the seriously distorted 'arrangements' of the song over and over again on radio or TV or on YouTube.