Need suggestions: High pitched female singers

Allison Kraus

Dolly Parton

Annie Haslam!

Five+ octave range, near perfect intonation, Great power, control, and dynamics, and loads of emotion.

She was the lead vocalist for British prog band, Renaissance. 

Longish tracks, with classical influences, great keyboards, and Annie's vocals floating over it all.

Touching Once

Ashes Are Burning

Emma Kirkby

Nana Mouskouri is the best selling female artist in the world. I haven't read the whole thread so someone may surely have mentioned her. if you are talking about the female singers with the high little girl voices, I have some names I can give you that isn't included in the female jazz singer thread. It isn't everyones cup of tea.