Hope mama got you something nice: Ms. Katherine E. Shaffer, better known as Bee, turns 21 today. Billionaire financier Leon Black is 57. Manhattan DA Robert Morgenthau is still going strong at 89. Defense attorney Ron Kuby turns 52. The Public's artistic director, Oskar Eustis, is 50. The Office's B.J. Novak is 29. Wesley Snipes is turning 46. Harry Potter scribe J.K. Rowling is 43. Actor Dean Cain is 42. Last but not least, banking heir (and father of socialite Bettina) Ezra Zilkha turns 83.