Here's an update. There are short blurbs for each on the "50 Great Voices" page:

5. Nusrat Fateh Ali Khan: The Voice Of Pakistan
6. Asha Bhosle: The Voice Of Bollywood And More
7. Elis Regina: The Feeling Between The Notes
8. Umm Kulthum: 'The Lady' Of Cairo
9. Jackie Wilson: The Singer And The Showman
10. Ella Fitzgerald: America's First Lady Of Song
11. Esma Redzepova: 'Queen Of The Gypsies'
12. Sezen Aksu: The Voice Of Istanbul
13. Nat King Cole: An Incandescent Voice
14. Dennis Brown: The 'Crown Prince' Of Reggae
15. Roy Orbison: A Great Voice, A Lonely Sound
16. Radmilla Cody: Two Cultures, One Voice

I was listening to this morning's article on Radmilla Cody, thinking it was a locally-produced item: Radmilla, whose father is African-American and mother is Navajo, was raised by her Navajo grandmother near Flagstaff, Arizona, and sings in Navajo. I was pleased to find it was part of the 50 Great Voices series.

~ Becky in Tucson