By InStyle Staff
Updated Apr 28, 2012 @ 3:00 pm
Credit: Hulton Archive/Getty Images

Happy Birthday, Ann-Margret! The classic film star and singer, whose scarlet strands and bombshell curves made her a superstar in the 1960s, turns 71 today. Help her celebrate by taking a look back at her Hollywood transformation, from pig-tailed teen in Bye Bye Birdie to sexy Emmy-winning guest star on Law and Order: SVU. Click through our gallery to see all of Ann-Margret's best beauty looks.