Former First Lady Barbara Bush is 79. Actor-comedian Jerry Stiller is 77. Comedian Joan Rivers is 71. Actor James Darren is 68. Singer Nancy Sinatra is 64. Musician Boz Scaggs is 60. Singer Bonnie Tyler is 51. "Dilbert" creator Scott Adams is 47. Actor-director Keenen Ivory Wayans is 46. Actress Julianna Margulies is 37. Actress Kelli Williams is 34. Actor Mark Feuerstein is 33. Folk-bluegrass singer-musician Sara Watkins (Nickel Creek) is 23.