'Daisy Jones & The Six' features Riley Keough's real live vocals in the show's most distressing concert scene

• Warning: This article contains spoilers for episode eight.

• "Daisy Jones & The Six" stars Riley Keough as Daisy, a charming singer who struggles with addiction.

• Insider spoke to music supervisor Frankie Pine about using Keough's live vocals in concert scenes.

The appeal of "Daisy Jones & The Six" hinges on the magic of its titular heroine.

In Amazon's limited series, Riley Keough plays Daisy Jones: a charming, passionate, and volatile young singer who struggles with various addictions. Her twin-flame connection with The Six's frontman Billy Dunne, played by Sam Claflin, sparks the perfect storm of creativity and notoriety in their dramatized world of '70s rock music.

In Taylor Jenkins Reid's original novel, Daisy is described as having an effortlessly powerful voice, one she doesn't truly value or work hard to maintain.

According to Billy, "Talent like Daisy's is wasted on people like Daisy."

But in real life, Keough was unsure about her musical abilities, despite her esteemed family legacy as Elvis Presley's granddaughter. She sang a quiet Fleetwood Mac song for her audition tape, but was told she'd need to "belt" to get the part.

"I was like, what does that even mean?" Keough told Vanity Fair. "I didn't even know how one gets to be able to sing loud."

Enter Frankie Pine, the show's music supervisor who helped spearhead a "band camp" for the cast.

"My heart and soul going into this was, 'They need to be a real band,'" Pine explained. "I wanted them to be a real band. I wanted to see them at the Troubadour."

Along with Keough's vocal coach, Pine was tasked with transforming the actor into a vocalist who could match the skill and stage presence of a fictional rock star.

In fact, whenever the cast was shooting concert scenes, they were singing and playing instruments live on set.