Donna Karan is celebrating her 60th birthday today, although you'd probably never guess it thanks to all the juice diets, yoga, Reiki and Kabbalah classes, and "therapeutic screaming" sessions. Others celebrating today: Photographer Annie Leibovitz is 59. Kelly Ripa is 38. Lorraine Bracco is turning 54. Sting is 57. And '80s pop star Tiffany is celebrating her 37th birthday.