You probably grew up blaring these tunes, but how much do you really know about them?

Here are 19 incredible facts about the most popular songs from the early aughts.

Hilary Duff actually decided to change the lyrics for "So Yesterday." Originally, the line was "why flip the bird that's already flown away," but she changed it to "I'm like a bird that's already flown away." Because she's classy like that and doesn't sing about flippin' birds.

Paramount Pictures purchased the rights to Avril Lavigne's song "Sk8r Boi" and had plans to turn it into a film. Can we all just share a moment of silence for this film which never came to be?

Outkast's "Ms. Jackson" was meant as an open letter from Andre 3000 to the mother of his ex, Erykah Badu. (However, Badu's mother was named Kolleen Wright, so, not really a "Ms. Jackson" at all.)

Ben Affleck has said that appearing in Jennifer Lopez's "Jenny from the Block" video is one of the biggest regrets of his life. As you have undoubtedly surmised, this interview took place well before the whole phoenix tattoo thing.

"Hollaback" by Gwen Stefani was a diss track aimed at Courtney Love. At some point, Love made a disparaging comment about Stefani, saying she was like a cheerleader in high school. Stefani took it in stride and made one of the most danceable diss tracks of all time. Remember "We Belong Together" by Mariah Carey? Well, there are two amazing facts you should know about it...

First of all, the dress Carey wears in the music video is her actual wedding dress from her 1993 wedding to Tommy Mottola. Second, the song spent 14 weeks in the No. 1 slot. Billboard named it the biggest and most-played song of the '00s.

We all remember dancing in the middle school gym to "Hey Ya!" but that wasn't the song's original title. The working title was "Thank God for Mom and Dad."

The guitar riff in the White Stripes' "Seven Nation Army" — in addition to being one of the best and most iconic guitar riffs ever — was inspired by the James Bond theme song.

Notice any similarities here? The choreography for Beyoncé's "Single Ladies (Put a Ring on It)" was heavily inspired by (or perhaps directly lifted from) routines originally created by famous dancer/choreographer Bob Fosse.

Shooting the music video for "All the Small Things" was a pretty big deal for Blink 182's Mark Hoppus. Why? Because he met his wife Skye Everly on the set! Now, let's talk Nickelback...

The song "How You Remind Me" only took 10 minutes to write and was completed a week before Nickelback was scheduled to record their next album. Actually, this one is totally believable.

"Since U Been Gone" was first offered to both Pink and Hilary Duff before Kelly Clarkson claimed it as her own. Can you even imagine anyone else singing it?

The song "Harder to Breathe" by Maroon 5 is about record label demands. (So is "Love Song" by Sara Bareilles!)

Jessie J co-wrote the song "Party in the USA." In fact, she was originally planning to record it herself, but it was determined not to be a good fit for her image. Nonetheless, she paid her rent for three years with the royalties from the song. So it all worked out.

This one is pretty mind-blowing. Kylie Minogue was offered "Toxic" before Britney Spears. She turned it down (obviously) and to be honest, I'm glad she did. That song is Britney's. I've "Gotta Feeling" about this next fact...

Will.i.am says that he wrote the song "I Gotta Feeling" within an hour after standing on the steps of the Lincoln Memorial at the inauguration of President Obama.

Remember the song "I Hope You Dance" by Lee Ann Womack? Of course you do. You're probably humming it right now. The song was so popular that it was turned into an inspirational gift book.

Taylor Swift wrote the song "Our Song" back when she was in high school. In fact, it was for a talent show.

The song "Drops of Jupiter" was inspired by a dream lead singer Pat Monahan had about his late mother. He said: "I woke up from a dream about a year after my mother passed away with the words 'back in the atmosphere...It was just her way of saying what it was like – she was swimming through the planets and came to me with drops of Jupiter in her hair."

In the music video for OK GO's "A Million Ways," only one band member is lip syncing the vocals. Interestingly enough, it's actually the bass player Tim Nordwind rather than the band's actual singer, Damian Kulash. And now for a fact about a song you were probably obsessed with in middle school...

It seems like everyone loved Evanescence back in the day — particularly the song "My Immortal." Except for co-founder Ben Moody, apparently. He left Evanescence only a week after shooting the music video for that song.

The song "Do You Realize??" by The Flaming Lips was the official rock song of Oklahoma from 2009 to 2013. Did you even know Oklahoma had an official rock song?

Alicia Keys originally wanted to play the convict in the music video for "Fallin'" but was instead forced to play the girlfriend who goes to prison to visit the convict. Label execs didn't want her first television appearance to feature her behind bars.

Remember Ciara's song "Goodies"? It started off as a riff on the children's rhyme "Who stole the cookies from the cookie jar?" As a result, the song was originally titled "Cookies."

When you think Norah Jones, the song "Don't Know Why" probably instantly begins playing in your mind. However, her version is actually a cover! It originally appeared on Jesse Harris' 1999 album Jesse Harris & the Ferdinandos. In the same way, "Before He Cheats" is probably inextricably linked with Carrie Underwood in your mind, right? However...

It wasn't written with her in mind. The songwriters Josh Kear and Chris Tompkins actually wrote "Before He Cheats" with Gretchen Wilson in mind.

And "Umbrella" was written for Britney Spears and offered to Mary J. Blige before Rihanna ultimately recorded it. (Personally, as much as I enjoy Rihanna's version, I am curious about what the other two would have done with it!)

The music video for Christina Aguilera's song "Dirrty" was banned in Thailand. The reason? The billboards featured in the background advertise "Thailand's Sex Tourism" and "Young Underage Girls."

Kelis, who sings about milkshakes in the song "Milkshake" actually doesn't really like milkshakes at all. "Funnily enough, I don't actually drink milkshakes," she said in an interview with Us Weekly.

Jay-Z wrote his verse for Beyoncé's "Crazy in Love" in 10 minutes. That just goes to show you what can be accomplished in 10 minutes (for both Nickelback and Jay-Z!). Now for a fact about Britney Spears' "Oops!... I Did It Again"...

The red jumpsuit Britney wore for the "Oops!... I Did It Again" was custom designed for her by Michael Jackson's costume designer. Makes sense, right?

Shaggy's huge hit, "It Wasn't Me" almost didn't come to be at all! The song wasn't going to be released as a single until a DJ played an illegally downloaded copy of it on the radio. It was then that the record label realized it had some real potential.

Remember when Kelly Clarkson won American Idol and sang "A Moment Like This"? Well, since weren't sure who would win the competition, Justin Guarini also recorded a version of the song. So did Tamyra Gray and Nikki McKibbin.

The song "Stacy's Mom" by Fountains of Wayne was inspired by a childhood friend of Adam Schlesinger's. That friend actually had a crush on Adam's grandmother.