If you have kids, they've likely forced Kidz Bop upon you. And if you don’t have kids, you’ve almost certainly seen the commercials and wondered who in their right minds would willingly listen to children singing sanitized, high-pitched versions of pop songs ranging from "Uptown Funk" to "Bad Blood." But there's more to Kidz Bop than meets the ear—here's what you don't know.

1. THE COMPANY STARTED BY SELLING OLDIES COMPILATION ALBUMS.

Cliff Chenfeld and Craig Balsam, the men who launched Kidz Bop, started their first music company out of Chenfeld’s apartment in 1990. Their big idea? Compilation albums. They started with "Those Fabulous ‘70s," a record of hits from the likes of the Partridge Family, the Bay City Rollers, and Starlight Vocal Band. (You may remember seeing the kitschy infomercial above.) "Monster Ballads" was another big hit for Chenfeld and Balsam, with more than 3 million copies sold.

2. THE IDEA FOR KIDZ BOP CAME A DECADE LATER.

Nearly 10 years later, both founders had families, and they noticed a void in the music offerings available for children too old for Barney but too young for Britney Spears. So they hired some kids to sing 20 songs, cut a record, then marketed the crap out of it. Investing in TV commercials paid off: The first Kidz Bop album sold 800,000 units—and it wasn't even available in stores.

3. THE KIDZ BOP KIDS HAVE HAD MORE TOP 10 HITS THAN MADONNA.

The 22 albums that have hit the Billboard Top 10 make the Kidz Bop Kids more successful than Madonna and Bob Dylan (who have had 21 albums each) and Elton John and Bruce Springsteen (who have 18 albums each).

4. “THE KIDZ BOP KIDS” HAVE EVOLVED.

The “Kidz Bop Kids” were originally just a variety of anonymous singers, likely low-cost talent as the company was finding its footing. These days, several talented tweens are chosen to be the Kidz Bop Kids every few years (Jezebel refers to it as the "Menudo Model"); they’re marketed as full-blown personalities, even being likened to this generation’s Mouseketeers.

5. ZENDAYA IS AN ALUMNA.

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The singer-actress-model-designer was a member in 2009, along with fellow future Disney Channel star and boy band member Ross Lynch. Other Kidz Bop successes include singer-actress Becky G and actress Spencer Locke.

6. THERE HAVE BEEN CONTROVERSIAL LYRIC CHANGES.

Even though the whole point of Kidz Bop is to be inoffensive, sometimes the fact that certain lyrics are deemed “offensive” is offensive in and of itself. For example, when Lady Gaga’s “Born This Way” was rewritten to exclude words like “gay,” “lesbian,” “transgendered,” and “bi,” people took note.

7. LAST-MINUTE ADDITIONS TO THE ALBUM AREN'T UNCOMMON.

To take advantage of the most current chart-toppers, Kidz Bop albums currently come out at the rate of four per year, up from the previous schedule of two per year. The quick turn means it's not unheard of for albums to be nearly complete when a song unexpectedly takes off, causing producers to scramble to get it included. That was the case with "The Fox" by Ylvis, which was rushed onto the Kidz Bop 25 album just days before it was manufactured.

8. THEY DRAW THE LINE AT CERTAIN SONGS.

Though the company is able to change most suggestive lyrics into words that are more kid-friendly—sometimes to hilarious effect—there are some songs that just won’t work. One of them: "Blurred Lines" by Robin Thicke. “There’s no way we can do a song like ‘Blurred Lines’—it’s just too suggestive,” COO Victor Zaraya said.

9. THE MAJORITY OF THEIR SALES ARE PHYSICAL CDS, WHICH IS UNUSUAL.

In an industry where sales are increasingly moving to the digital realm—CD sales have hit a record low, in fact—the majority of Kidz Bop sales are still physical copies. Zaraya says that's due to the extras they offer with each purchase—like stickers and magnets. "There's a tangibility," he says. "Parents want to be able to put something in their kid's hands."

10. THERE’S A LOGICAL EXPLANATION BEHIND THE “Z” IN “KIDZ BOP.”

The “z” in Kidz Bop isn’t there just to be edgy—it’s there because the alternate spelling made it easier to trademark.

11. THEY'RE NOW IN THE ORIGINAL SONGS BUSINESS.

The gang did their first-ever original song on Kidz Bop 30 in 2015, a spunky little ditty called "Make Some Noise." They even shot a video for it: