Peppa Pig is the titular character from a retarded children's cartoon of the same name, called, of course, Peppa Pig. She appeared in the Family Guy episode, "Connie's Celicia".
Biography
In "Connie's Celicia", Connie D'amico faked her own death by dressing Peppa Pig like her, putting her in a car, with the breaks cut, and having her driven into a four way intersection of heavy traffic. Peppa Pig was graphically killed and Joe Swanson had to break the news to her mom and dad.