Question Author
emu777 - it doesn't at all.
This is another 'Nessun Dorma' - almost anyone can sould good singing this song because it's the song, not the singer that makes the impact.
If you listen in isolation - without Gran weeping, and the audience whooping, and the 'sad story - and just listen, what you hear is a wonderful wodnderful song sung not particularly well by an also-ran singer.
Compare it to the Adele version - where every note is nailed totally on tune, and the motion seeps out bit by bit - and then listen to the judges weeping all over this woman in an outpouring of cod emotion that is really not deserved.
It's great TV - but it's not great singing talent - one lasts a few weeks, and drops away, and as Adele proves, talent lasts.