I've noticed there are a lot of songs titled "Heavy is the crown" which seemed vaguely Shakespearean in origin. It turns out there are even more songs titled "Heavy lies the crown". There is a common saying, "Heavy is the head that wears the crown" which is a misquote or variation on the actual Shakespearean phrase: "Uneasy lies the head that wears a crown" from Henry IV (from the mouth of the king himself).


