She was the greatest. And that's saying a lot, given the wonderful women who have blessed our world in the genre, including Whitney, Roberta, Etta, Gladys, Patti, Chaka, Minnie and Anita, just to name a few.
I remember watching that Kennedy Center performance as if it just happened yesterday. And, of course, her visit to the White House, also in 2015:
What a voice!