The Surprising ‘Lizzie McGuire Movie’ Fact You Probably Missed

Everyone knows that The Lizzie McGuire Movie is one of the most iconic movies of our time, and it's for a number of reasons. It started the trend of having Disney Channel shows spinoff into big screen movies (you're welcome, Hannah Montana), it showed Gordo's successful journey out of the friendzone, and it gave us the pop ballad that you can never get tired of, "What Dreams Are Made Of". But, in your thousands of times of watching, there is one thing you probably didn't notice about The Lizzie McGuire Movie and it will leave you shook.

First things first: Remember Isabella? The Italian music sensation Lizzie was impersonating aka the better half of the famous European pop duo, Paolo and Isabella? It is common knowledge that Hilary Duff played both Isabella and Lizzie in the movie, but what if I told you that she did not provide Isabella's singing voice. I'll give you a second to process that...

Welcome back! I know, I felt betrayed when I first found out, as well. It made me think about what else I could've been lied to about during my childhood. Did that boy in first grade really pick on me because he liked me? Did my dog actually go upstate to live on a farm?

While recovering from the biggest deception of my formative years, I learned who actually gave us Isabella's singing voice and, honestly, it was extremely comforting. I guess the producers wanted to keep it all in the family because her singing voice was provided by none other than Hilary's older sister, Haylie Duff.

The Lizzie McGuire Movie isn't the only time that that sisters have collaborated. They co-starred together in the 2006 movie Material Girls and they've joined forces to cover songs like Madonna's "Material Girl" and the Go-Gos "Our Lips Are Sealed". Haylie also went on to have her own separate music career, recording songs for movie soundtracks including Stuck in the Suburbs and Raising Helen. She even sang a duet with Family Guy's Seth MacFarlane.

So, it's no secret that there is more than one musically gifted Duff sister, but that doesn't make it any less surprising that Haylie sang for Isabella. I guess the blood relation explains why her voice is so similar to, and easily mistaken for, Hilary's.

Now that we're all on the same page, there's one thing I think all Lizzie McGuire movie fans can agree on:It's been way too long since we've had a Hilary/Haylie team-up.