Complex sentence: The song starts with the first verse, featuring Yankovic ordering 19 extra large boxes of pizzas from Pizza Hut, he's having a pizza party at his house, everyone didn't come to the party, so he eats too much of them.
Split into simpler sentences: The song starts with the first verse, featuring Yankovic ordering 19 extra large boxes of pizzas from Pizza Hut. He is having a pizza party at his house, everyone didn't come to the party, so he eats too much of them.