'Schitt's Creek' stars reveal a pizza-related fight happened on set

I would listen to the stars of Schitt's Creek talking about just about anything. Especially when it comes to hearing about what it was like behind-the-scenes on the beloved show. 

On The Tonight Show, Daniel Levy, Eugene Levy, Catherine O'Hara, and Annie Murphy got quizzed by Jimmy Fallon about life on set. 

One...