What is the funniest joke on earth?

1. A woman gets on a bus with her baby. The bus driver says: ''Ugh, that's the ugliest baby I've ever seen!'' The woman walks to the rear of the bus and sits down, fuming. She says to a man next to her: ''The driver just insulted me!'' The man says: ''You go up there and tell him off. Go on, I'll hold your monkey for you.''