Guy Fieri invites all-star pizza maestro Chef Christian Petroni to Flavortown to help officiate a throwdown between three pizza-making pros. After making a special delivery of whammy pizza ingredients, Guy and Christian put in an order for the compet... (more)itors' signature pizzas. Then, Guy brings out the Pizza Wheels of Doom to determine the type of pizza the chefs have to make, and the one with the highest-scoring pies will get the chance to win some serious dough!