Surprise!

Summary
It's Catherine's 16th birthday, and Francine has been cordially UN-invited to the party. With the help of her friends, Francine whips up the perfect present for her big sister...a sneaky surprise with a side of payback!

Characters
=== Major characters===
 * Catherine Frensky
 * Muffy Crosswire
 * Francine Frensky
 * Prunella Deegan
 * Rattles
 * Alan Powers
 * Alex
 * Binky Barnes
 * Fern Walters
 * Alberto Molina
 * Chip Crosswire
 * Angi
 * Tami
 * Debi
 * Jenna Morgan
 * "Ballerina (Muffy Goes Metropolitan)"
 * "Unknown Elwood City Librarian"
 * "Unknown Female Adult Rabbit (Number 7)"
 * "3rd Grade Male Aardvark"
 * Buster Baxter
 * "Unknown Male Adult Rabbit (Number 4)"
 * Sean (teenager)
 * Oliver Frensky
 * D.W. Read

Trivia

 * This is the first episode to reveal Catherine's age.
 * Francine says that Sean looks like a rodent.
 * It is revealed that Catherine has a crush on Sean according to her diary.

Episode connections

 * Arthur and Buster wrote fake letters to Francine and Brain in "The Big Blow-Up". Muffy sent Chip a fake phone message from Catherine in "Matchmaker, Match Breaker". Chip is in attendance at the party.