A lot of stars are celebrating their birthdays today: the ever-impressive Chita Rivera is 75, erstwhile Buck Rogers Gil Gerard is 65, Anita Pointer of the Pointer Sisters is 60, Richard Dean “MacGyver” Anderson is 58, Anita Baker is 50, NYPD Blue/American Dreams alumna Gail O’Grady is 45, Mariska Hargitay is 44, and Tiffani Thiessen is 34. But the name on today’s list that made me smile like I was 12 again was Robin Zander of Cheap Trick, who turns 55. (Admit it: right now, you’re singing to yourself, “Mommy’s all right, daddy’s all right…”) So let’s wish the singer-guitarist, and all his fellow Jan. 23 celebrants, a happy birthday, and enjoy him in his Breck-girl-blond heartthrob heyday below.