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Mary J. Blige Vocal Range is a Four Octave Vocal Range.
rons vocal range is eight octaves.
I believe Mr Warlow's vocal range is Tenor to Baritone.
Beyonce's Vocal Range is A2-F6
Ozzy Osborne actuallyhas a pretty impressive vocal range. According to a google search, the vocal range for him is B1-F5(-G♯5)