Which is the highest female singing voice?

Another superb soprano is Loreena McKinnett. Listen to her song The Lady of Shalott. She has many more outstanding songs in her album Night at the Alhambra (along with equally superb musicians!).

Minnie Ripperton was also able to sing in the Whistle Register. Her song "Loving You" was an excellent example of this.

The answer is wrong! Mariah Carey, Christina Aguilera and Arianna Grande can all sing notes in the Whistle Register.

this is the closest I've ever seen majority vote be this tight in margin