Shirley Halperin Executive Editor, MusicAs hit songs often go, BTS’ “Butter” started with a simple hook. Jenna Andrews, the seasoned songwriter-producer-publisher-A&R executive and all-around industry badass, played it for Columbia Records chairman Ron Perry, himself a skilled musician and creative, who immediately thought of Michael Jackson’s “Smooth Criminal” and a smash was born.But the road to “Butter,” the No.