"She is so full of life and spirit and she loves playing jokes on people and she likes to keep you on your toes, but musically I have never met anyone who can walk out on stage and consistently sing as in tune and proper and right as Dolly Parton does, " her sometime duet partner Kenny Rogers told CNN.

CNN: Dolly Parton: 'I know I'm a bit over-exaggerated'

"They sing their tune, and in return receive all sorts of treats in the form of baked goods, cookies, pies, " Cion says.

NPR: Choirs And Carols: An NPR Christmas

While it would be hard to sing the same tune regarding the overall state of the stock market in the U.S. it might be okay to hum along.

FORBES: Investors Looking to U.S. Stock Market This Year

"I sing in the shower as they say, and I can carry a tune - but even my ability to carry a tune deserted me under pressure, " he says.

BBC: The wizard of weirdness

In 1835, "...the tune that we now sing... was married to the words of John Newton, " Turner says.

NPR: 'Amazing Grace'