Queen Elizabeth's 83rd Birthday

Happy Birthday, Queen Elizabeth II! 21st April (2009) marks the monarch's 83rd year, though the occasion is celebrated twice a year in England: once privately, on her actual birthday, and again with an official national celebration in June.Today we offer a look back at some of her most glorious gowns, as well as a few of her more casual moments, and what she wore to meet U.S. presidents,