Jon and Liz put Garfield on a diet and force him to exercise when an electronic talking scale tells him that he's overweight.

Jon tries to take the "perfect family picture" for Liz's birthday present but people always come and disturb everything.

Garfield switches lives with a celebrity, Sir Leo, who is also Liz's cat claiming that the life of a super star is great. Sir Leo looks just like Garfield but speaks with a British accent. This is similar to Garfield: A Tail of Two Kitties.

Garfield gets sucked into a parallel universe where cats act like humans and humans act like cats where he meets the human-like Garfield.