Vocal Range Analysis
(C#3 - Bb5)
Lowest Note: C#3 - Un-thinkable
Highest Mixed Note: Eb5 - Will You Be There
Highest Head Note: Bb5 - Lady Marmalade
She has the widest vocal range of the series (contrary to belief). Andrea was the only one who came close, showing 2-3 octaves (G2#-C5#).
And damn, I never checked that Lady Marmalade note. She has about 2 octaves and a bit of chest voice but you can tell with coaching she can go to F5#, maybe G5.