It was rumored that Dolby had vari - sped Bertei 's voice for her high solo notes in the song .
She proved the critics wrong , performing the song live on the Old Grey Whistle Test in 1984 .
It was rumored that Dolby had vari - sped Bertei 's voice for her high solo notes in the song but she proved the critics wrong , performing the song live on the Old Grey Whistle Test in 1984 .