We may not find out how Carrie Bradshaw celebrates her 50th until the sixth Sex and the City movie debuts in a decade or so, but the character's creator, Candace Bushnell, will experience the milestone for herself today. It's a big day for Woody Allen, too. He's 73. Bette Midler is turning 63. Sarah Silverman is 38. John Densmore, the drummer from The Doors, is 64. Actor Treat Williams is 57. Fox News correspondent Rick Leventhal is 49. Brit actress Emily Mortimer turns 37. And former supermodel Carol Alt celebrates her 48th today.