By InStyle Staff
Updated May 20, 2012 @ 3:00 pm
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Credit: Michael Ochs Archives/Getty Images; Kevin Mazur/WireImage

When it comes to Cher, the regular rules don't apply. Born Cherilyn Sarkisian, she was a bride by 18, a number one pop star by 19 and a TV star by 25. It was during her stint on The Sonny and Cher Comedy Hour, that she developed her signature style with the aid of designer Bob Mackie and an ocean of faux locks. Today is her 66th birthday—here's to a happy one!—click through the gallery to see her beauty evolution.