Oscar/25, the monkey, is played by Katie, the same animal known as Marcel in the TV show Friends (1994).
The character of Ed Argent (Chip Joslin) was originally supposed to be Ted Nugent. When they couldn't get him, the writers changed the name and added a reference to the '70s band Argent.
The song that Veronica (Kristen Bell) plays to show that the room is Canadian is "One Week" by the Barenaked Ladies , who are a Canadian rock group.