David Bowie turns 63 today. Fashion designer Carolina Herrera is turning 71. Everyone's favorite British theoretical physicist, Stephen Hawking, is 68. Robert Kelly (or R. Kelly to you and me) is turning 43. Sean Paul is 37. Baseball players Jason Giambi and Carl Pavano are 39 and 34, respectively. Actress Sarah Polley is 31. Wolfgang Puck is turning 61. DJ Clue is 35. Susan Berresford turns 67. Composer David Lang is 53. And legendary game show host Bob Eubanks turns 72 today. A few weekend birthdays are below.