Just to be different i shall vote for "Kashka form Baghdad" just for the way she says Kashka at the beginning and i think that Kates voice is so marvelous in it. But "Syphony in Blue" was a very, very close second, i love the way she miss enunciates in the chorus.
I was really stuck, as I love so many so I voted on my mum's behalf ;D She likes Kate, but only because she has to (because of me and how much I play her music, LoL) - and Kate was in her time!!! But she absolutely loves Oh England My Liuonheart! She cried the first time she seen it on Live @ Hammersmith ;D