Fans of Guns N’ Roses will tell you how fast "Sweet Child O’ Mine" was written. In under an hour, the band developed the accompaniment for a melody one of them had come up with—a hand-warming riff that guitarist Slash was playfully improvising. That same riff, by-now famous guitar melody, opens the song.

Hearing the result, Axl Rose wrote lyrics inspired by his then-girlfriend, Erin Everly, whose smile, it seemed to him, reminded him of childhood memories. Remarkably, he completed the poem in a single day. Later, while recording in the studio, the band made another on-the-spot call: they decided to include a sung line that Axl Rose had been repeating while searching for an ending to the song, "Where do we go now?"

Image: Kyle Buss

Michael Jackson didn’t shy away from saying that he always knew "Billie Jean" was going to be a hit. While writing it, he was aware that he had hit material in his hands, and he worked on it accordingly. Thanks to his rigorous daily vocal training during the production of Thriller, Jackson recorded the main vocal in a single take. The song was mixed 91 times, while he and producer Quincy Jones strived for perfection. In the end, they settled on mix number two—the version we know today.

But here is the most impressive anecdote behind "Billie Jean." Jackson was driving his Rolls-Royce between recording sessions, obsessed with finding the best ideas for his song. He was so absorbed that he didn’t notice the underside of his car had caught fire—until a passing biker alerted him.

Image: Call Me Fred

Can you imagine the iconic opening vocals of "You Give Love a Bad Name" belted out by any other voice than Jon Bon Jovi’s? A female voice, perhaps? Surprisingly, the melody was originally written by hitmaker Desmond Child for Bonnie Tyler. Her version, titled "If You Were a Woman (And I Was a Man)," featured different lyrics, and was released earlier that same year in 1986.

Dissatisfied with the final result of Tyler’s song, Child decided to take the same seed of an anthem and team up with Jon Bon Jovi and Richie Sambora to rework it. The result was a powerhouse anthem that propelled Bon Jovi to the top of the charts. It also marked a radical change in the band’s career, which veered from then on to a more radio-friendly, arena-rock sound that would define their style.

Image: Benjamin Farren

If you strip this '80s rock anthem of its drums, bass, guitar, and even its melody, you’re left with a simple yet powerful plea: "Don’t stop believing." Those words have a heartfelt origin. When Jonathan Cain was invited to join Journey, he started working on a song, first deciding that he was going to name it after the words his father would repeat to him over the phone while he was still a struggling musician in L.A.: "Don’t stop believing or you are done, dude."

Cain wrote the emotional chorus first before sharing the project with the band to complete it together. That’s why it’s said that the song was written "backward." The arrangements were carefully crafted to build up to the climactic final chorus. If you pay attention, this one doesn’t appear until near the end of the song—a structure that sets it apart.

Image: Kristina Chuprina

119 significant events are mentioned in the famous 1989 song by "Piano Man" Billy Joel. A rapid-fire history lesson, covering science, sports, music, politics, cultural icons, movies, and so many more, is uttered to assemble an image of the 40 years the artist had lived until then—from 1949 to 1989. The story of how he stumbled upon the idea for this musical whirlwind is just as fascinating.

Legend has it that Joel was in the studio one day when Sean Lennon, John Lennon’s son, visited with a young friend. The 20-year-old started complaining about the hardships of growing up in the ‘80s, and Joel replied that the ‘60s weren’t exactly easy either. This sparked a discussion where each mentioned world-relevant events they had lived through. Inspired, Joel jotted down the events and began piecing them together, eventually crafting the iconic song.

Image: David Clode

"I Will Always Love You," immortalized by Whitney Houston’s rendition for The Bodyguard (1992), was actually written 18 years earlier by Dolly Parton. Although it became a romantic power ballad in the voice of Houston, the original version hadn’t been written with romance or heartbreak in mind—it was a heartfelt farewell.

In 1972, after having become a performing regular in The Porter Wagoner Show, Dolly Parton decided it was time to leave and pursue her own path. Her deep appreciation for Wagoner and her love for her colleague drove her to write a sweet, sincere song to express her feelings. Explaining that, despite needing to move on, and regardless of where life took her, she would always love him. Touched by the song, Wagoner loved it and asked to produce it himself.

Image: Wes McFee

"Maniac," made famous for its inclusion in the Flashdance (1983) soundtrack, is another example of a song that started with a very different theme. Its original name was still "Maniac," yes. But it wasn’t originally about a passionate dancer—it was about a serial killer.

Dennis Matkosky, the song’s author, had seen in the news a story about a psychotic criminal and conjured in his mind a song that warned of his deeds. Together with his friend Michael Sembello, they finished that version for their own amusement. The demo ended up being one of the songs used in the set of Flashdance for being upbeat, catchy, and danceable. Director Adrian Lyne grew so fond of it that he asked Matkosky and Sembello to rewrite the lyrics to better suit the film. The reworked song became a global hit, reaching the top 10 of pop charts in multiple countries that year.

Image: David Monje

If hearing the song "Shout" by The Isley Brothers makes you think of a festive event where a band interacts with a dancing audience, it means the song retained its original spirit. The iconic phrase "Jump up and shout now" was part of a series of playful instructions the band improvised during a live performance. At the time, they were covering "Lonely Teardrops," a Jackie Wilson hit, and went off on a tangent building on the climax of that song.

The band began shouting ad-libbed lines, encouraging the crowd to participate. That responsorial dynamic became the foundation of "Shout," and evolved further through subsequent performances. Once the song was written down and recorded, it became a timeless classic. Today, this 1959 hit remains a staple at celebrations around the world.

Image: Brett Sayles

A song with the famous line "You're so vain, you probably think this song is about you," has sparked decades of speculation about who inspired it. Mick Jagger, James Taylor, and Warren Beatty were all rumored to be the subject behind Carly Simon’s famous song. The singer and songwriter delighted in keeping the identity of any precise man a secret, and at some point declared that it had been written about a type of man in general.

However, in 2003, for a charity auction organized by Martha's Vineyard Possible Dreams organization, Simon decided to offer one big treasure to the highest bidder: The truth behind the song. Her friend Dick Ebersol paid $50,000 for the revelation. Under sworn secrecy, Simon revealed the person to Ebersol. He kept the secret, only telling the public that he found the answer "very surprising."

Image: Dinielle De Veyra

"I Walk the Line" was Johnny Cash's declaration of commitment and faithfulness, a song written for his first wife, Vivian Liberto. As he prepared to embark on long tours, Cash penned this song as a vow to assure her that he would remain true to her.

Beyond the inspiration for the lyrics, the song showed an array of singularities that made it stand out back in 1956. For example, each iteration of a verse is sung in a different key, a unique technique that can be heard in the gradual shifts of Cash’s voice. The low hum before each verse is Cash’s preparation for singing in each corresponding key. He also innovated by attaching a piece of paper to his guitar’s end which he would hit while playing, simulating the sound of a snare drum that can be heard in the song.

Image: Simon Migaj