Need suggestions: High pitched female singers

Kathleen Battle, e.g.,listen to 

"Let the Bright Seraphim" 

in trumpet duet with Wynton Marsalis.

@tony1954 LOL!

   Barry Gibbs

Charlotte Martin

The Staves

Eva Cassidy

Regina Spektor

Yep, Minnie Riperton, first to come to mind, four octive range. I like her work with Rotary Connection, very unique sound. As an aside, her mother was the inspiration for  Cab Calloway's, "Minnie The Moocher".

Britney Spears & Ariana Grande

As mentioned Joni Mitchell and pretty much perfect pitch when "measured".

DeKay

Cristina Deutekom singing in Mozart's 'Magic Flute'. Sings Queen of the Night with much enthusiasm - coloratura soprano at its best. Solti conducting.

Joan Sutherland singing the songbird in Wagner's Ring, also by Solti.

La Castafiore

Mariah Carey

Joni Mitchell

Celine Dion

Chante Moore

Barry Gibbs

Yoko "Oh No!"

You asked for "high-pitched", but she actually has no pitch.

Kristeen Young - she's made 11 great albums over 25 years and nobody's heard of her, but she's the deal as far as writing, singing, arranging, and producing....New album coming out this Friday! 

Lene Lovich, Victoria Williams, Tiny Tim ;-) .

Joan Baez 

Judy Collins

London Grammar lead singer

Technically, pitch refers to one note, a single sound within the whole range; a high pitch would refer to a note in one of the upper registers.  Being pitchy, of course, is not a good thing, being a little sharp or flat of the particular note that a singer is trying to produce.  I believe what you are asking about are, more exactly, female singers with a vocal range that extends higher than normal.

This may not be your cup of tea, but she certainly gets up there.

Not female, but high pitched...

DeKay

Minnie Riperton

Andra Day

Anna Netrebko

Sara Brightman

Gale Moran