Who of the modern singers, a unique eight-octave voice?
There are no such female singers in nature !!!Three octaves is the entire possible range of the human voice. A performer or performer with a range of more than three octaves has unique vocal abilities! But these can be counted on the fingers of one hand.
Perhaps this is Georgia Brown, a Brazilian singer of Italian descent, twice in the Guinness Book of Records for the highest note sung by a person and for the widest vocal range. Her voice is capable of sounding eight octaves (from the G of a large octave to the G of the seventh octave). But the opinions of music critics about her vocal abilities (beyond human capabilities are almost ultrasound) are different. Some consider it a phenomenon, while others argue that the ability to sing does not mean singing with ultrasound.