|Cher by Avedon, Mononym to Mononym|
Early on, before settling on her defining monosyllablism, she was briefly known profressionally as Bonnie Jo Mason, Cherilyn, and Cleo. She's got her Oscar, not to mention a shelf-full of lesser honors, not to mention a fortune conservatively estimated in the hundreds of millions. Notwithstanding that she headlined a multi-year, multi-continent Farewell Tour once upon a time earlier this century, she's getting ready to hit the road again this fall. Just as well; the world could always use a little more Cher.
She's 66 today, and that seems like the most improbable thing of all.