Malcolm Gladwell, author of The Tipping Point and Blink and staff writer at The New Yorker, turns 45 today. Others celebrating: Novelist Kiran Desai is 37, famed editor Gary Fisketjon is 54, and advertising guru Bryan Buckley is 45. Writer/director Noah Baumbach is 39. Charlie Sheen is turning 45. Former VJ and now Web personality Adam Curry is 44. And Arianna Huffington's right-wing ex-husband, Michael Huffington, is 61 today.