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World records and extremes of vocal range. 1  The highest vocal range in the world, according to the Guinness Book of World Records, is that of Georgia Brown; a Brazilian female singer who produces unusually high pitches using a whistle register. Her range extends eight octaves, from G2 to G10.
Certainly one of the greatest female vocalists of the last century. She sang some othe best songs in the 60's and early 70's. I also enjoyed her mid - late 70's and 80's period records. Yes they weren't transcendent but quite enjoyable anyway.