Mariah Carey - Without You. Mariah Carey is also one of my favorite female vocalists. She is so expressive (one of the most important parts of singing well - most amateurs don't give enough expression to their singing!) - and she has a tremendous range. She is one of the few singers who use what's called a "whistle range"; a very, very high pitch that not many are capable of. It's a trick of the vocal cords. I'll post one of her songs where she uses this.
Mariah Carey: The high octaves she could hit were talked about in amazement for most of the decade. Today we just question her decision to name one of her offspring Moroccan and hope she doesn't ever make another film.