You can bet the always-elegant Oscar de la Renta will be especially well-dressed today: He turns 76. Other people celebrating: Actor Willem Dafoe is 53. Comedian John Leguizamo is turning 44, as is David Spade. Crooner Rufus Wainwright is 35. Literary queen Ann Godoff is 59. So is union leader Mike Fishman. Advertising honcho John Wren turns 56. And Danny Glover is 62.