Chaka Khan Good Genes or Good Docs?

3/24/2013 12:30 AM PDT BY Johnny Lopez
Ain't nobody ... aging as well as Chaka Khan.

Here's the then 41-year-old "I Feel For You" singer back in 1994 (left) -- and 19 years later, the Queen of Funk-Soul celebrating her 60th birthday this week (right).

She is not every woman.