It's a special day for two important men in the fashion biz: Ralph Lauren is 69 and Isaac Mizrahi is 47. Also celebrating today: Yankees manager Joe Girardi is 44. Marc Jacobs' longtime business partner Robert Duffy is turning 54. Feminist writer Katha Pollitt is 59. Dixie Chicks singer Natalie Maines turns 34. Usher is 30. Model Daniela Pestova turns 38. Wrestler/actress Stacy Keibler is 29. And Madonna's daughter, Lourdes Leon, is turning 12.