It's a busy week for Amy Poehler. Last Saturday, she helped SNL score its highest ratings in years and then announced yesterday that she's planning to leave the show in November. Today she celebrates her birthday: She's 37. Also celebrating: Marc Anthony is 40 (although he held his big birthday blowout on Sunday at the Bowery Hotel.) Lauren Bacall is 84. Magician David Copperfield is 52. Nick Jonas is 16. Actress Alexis Bledel is 27. Mickey Rourke is 52. The artist Christopher Wool turns 53 today. Fortune's managing editor Andy Serwer is 49. Harvard professor and author Henry Louis Gates is 58. Televangelist Robert Schuller is 82. And blue's legend B.B. King is 83.