Vera Wang turns 59 today. Fashion designer Norma Kamali is 63, Broadway producer Roger Berlind is 78, book editor Cindy Spiegel is 48, and Tobey Maguire is 33. On Saturday, scenester and rock star scion Alexandra Richards will turn 23. Editor Harry Evans will celebrate his 80th. Other people celebrating birthdays this weekend: Michael Cardozo, Wendy Kopp and Scott Heiferman.