JELLY ROLL BREAKS DOWN AFTER WATCHING PAUL McCARTNEY’S NEW DOCUMENTARY: The Country Star Says One Scene ‘Shook Something Loose in Me,’ Admits He’s Been Hiding His Own Private Battles, and Hints He May Finally Reveal the Songs He Only Writes at 3 A.M. — A Confession So Raw That Fans Are Asking Whether This Is the Start of Jelly’s Most Emotional Era Yet