Leading up to the Grammy nominations on Nov. 7,  Rolling Stone  is breaking down  10 different categories . For each, we’re predicting the nominees, as well as who will (and who should) win on Grammy night.  A fictional band, a Puerto Rican superstar, and a popstar who rhymes “amen” with “hey men.” Our predictions for Song of the Year vary wildly, but if there’s one thing we know about the Grammys, it’s that they like to keep us on our toes — specifically when it comes to this category. The