When it debuted on Broadway, “Bye Bye Birdie” was commentary on contemporary life. Today, the musical-comedy is a period-piece about pop-culture in 1960. It’s an attitude embraced by the producers who are reviving “Bye, Bye Birdie” in Lexington. Here with a preview is Rich Copley of the Lexington Herald Leader. He spoke with WEKU’s Charles Compton.