Does National Jam Day mean anything? Photo: Todd Owyoung/NBC Sorry, Jimmy, for one day, the Tonight Show belongs to Taylor Swift . Fallon wasted no time, skipping his monologue minus a few Taylor jokes, to introduce his highly anticipated guest and her love of baking sourdough bread. Sorry, sourdough is not an Easter Egg; the Showgirl just loves to bake. “I have become the most annoying person that anyone knows about the topic of bread,” Swift half-joked, knowing that many of her interviews