Jo-jo, also known as Jo-jo the Gigantic Baby, is one of America's important people who appeared in the episode, iCook, as a guest on iCarly.
He is always babbling to communicate with people when he was talking or asking about something.
Carly and Sam interviewed him about his personal life as a gigantic baby. Sam made Jo-jo cry when she asked him "Jo-jo, how much do you weigh?", but Carly immediately comforted him.