I was trying to figure out how old she was...I suspect the same thing that happened to my voice since I was in the high school choir nearly 40 years ago...
Dionne Warwick is 66 I believe. Born in 1940
I know our voices don't hold up but look at folks like Tony Bennett, Ella Fitzgerald, Frank Sinatra and others who, way into their twilight years, still sounded pretty darn good. Dionne sounded like she could barely sing.