Singer Joan Baez is 73. Guitarist Jimmy Page of Led Zeppelin is 70. Singer Buster Poindexter is 64. Singer Crystal Gayle is 63. Actor J.K. Simmons (“Juno”) is 59. Actress Imelda Staunton is 58. Actress Joely Richardson is 49. Singer Dave Matthews is 47. Singer A.J. McLean of the Backstreet Boys is 36. Guitarist Drew Brown of OneRepublic is 30. Actress Nina Dobrev is 25.