Kimora Lee Simmons has good reason to munch on some cupcakes today. It's her 34th birthday. Given the events of the past year, former AIG chief Hank Greenberg probably isn't in the mood to celebrate, but it's his 84th birthday all the same. Others turning a year older today: Comedian Will Arnett is 39. Lance Bass is turning 30. Columnist George Will is turning 68. Actor Richard Jenkins is 62. Former SNL castmember Ana Gasteyer is turning 42. ESPN reporter Erin Andrews turns 31. Pia Zadora is 55. Gallerist Jeanne Greenberg Rohatyn is 42. And two of the city's top lawyers, Ed Herlihy and Paul Roth are turning 62 and 70, respectively.