The mood of “A Chorus Line”’s half-century fete is bittersweet. Because the last time I walked out of a new Broadway musical feeling the thrill of having just watched a really big hit was a decade ...

Yankovic’s career started in the late ’70s and exploded with MTV in the early ’80s. Over the decades he’s lampooned, among others: The Knack (“My Bologna”), Michael Jackson (“Eat It”), Madonna (“Like ...