This was the intended series finale, although it was aired out of order.
At the end of the episode "I Can't Wait" by Hilary Duff can be heard. "I Can't Wait" was originally sung by Brooke McClymont. Brooke McClymont, Matthew Gerrard, and Christopher Ward wrote "I Can't Wait". Hilary Duff covered "I Can't Wait" for the "Lizzie McGuire" soundtrack. She later released "I Can't Wait Remix" on her CD single for "Why Not". "I Can't Wait" was later featured in the Disney Channel Original Movie "Right on Track".
Ethan Craft ( Clayton Snyder ) tells Lizzie she should watch him play water polo when they are in high school. Snyder actually played water polo for Pepperdine University and was an Honorable Mention for the All-American team in 2004, his sophomore year.