In Season 2, McCartney, famous musician, pops out of a cake at Diane's thirty-fifth surprise birthday party.
Unfortunately, by then, everyone has left.
- "I came all this way to jump out of a cake? Honest."
- A newspaper of the Beetles is shown with actual beetles on it. It is possible that Paul McCartney wasn't apart of the famous band or his band had a different name in thev BoJack universe.