Singer-actor Johnny Hallyday is 70. Singer Russell Hitchcock of Air Supply is 64. Singer Steve Walsh of Kansas is 62. Country singer Terri Gibbs is 59. Actor Jim Belushi is 59. Actress Julie Hagerty (“Airplane”) is 58. Guitarist Brad Gillis of Night Ranger is 56. Drummer Scott Rockenfield of Queensryche is 50. Actress Helen Hunt is 50. Actress Courteney Cox is 49. Guitarist Tony Ardoin of River Road is 49. Guitarist Michael Britt of Lonestar is 47. Drummer Rob Mitchell of Sixpence None the Richer is 47. Rapper-actor Ice Cube is 44. Actress Leah Remini is 43. Trombone player T-Bone Willy of Save Ferris is 41. Actor Neil Patrick Harris is 40. Actress Elizabeth Reaser (“Twilight”) is 38. Singer Dryden Mitchell of Alien Ant Farm is 37. Guitarist Billy Martin of Good Charlotte is 32. Actor Denzel Whitaker is 23.