Need suggestions: High pitched female singers

Minnie Riperton

Not female, but high pitched...

DeKay

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.

London Grammar lead singer

Joan Baez 

Judy Collins