Songfacts®:

• "L'amour de ma vie" means "The love of my life" in French. Here, Billie Eilish reflects sarcastically on a past relationship filled with emotional chaos. She's clearly happy the relationship is over.
• The song starts off as a ballad with a whiff of old Hollywood. Billie, in a voice as nonchalant as someone ordering fries, admits to lying about her ex being her "one true love," while chastising this person for moving on to a new lover after their relationship ended.
  
  Halfway through, the mood does a 180, morphing into a dance-floor frenzy of synthesizers and liberally applied Auto-Tune.
  
  "I'd been doing a lot of cardio circuits," Eilish explained to Rolling Stone. "Jump-roping and box-jumping and all that stuff. And I was like, 'I don't have a song I can do cardio to.' It was kind of a joke. Auto-Tune is the most fun thing. People have this idea that it's disingenuous, because they think it's, like, a tool. Absolutely it is. F--k it. It's an aid; it helps you make the song better."
• Lyrically, in this second section, Billie is shedding the heartbreak. She throws shade at her ex, having found solace in the arms of... her ex's ex! Billie rubs it in good measure. She practically purrs about how much better off they both are without this chap, both being "so pretty" that he must be kicking himself.
• Eilish stated on fan pages that the two sections of this song are based on different people. She said she couldn't reveal names, but fans have theorized that the lyrics reference a past relationship between Eilish and musician Jesse Rutherford, frontman of the rock band The Neighbourhood. The couple dated over several months in 2022 and 2023.
  
  Furthermore, rumors suggest that Devon Lee Carlson, a social media influencer and former partner of Rutherford's, may be the other individual referenced in the song's second half. Eilish and Carlson have reportedly become very close.
• Finneas O'Connell, Billie Eilish's brother, holds the producer credit for "L'amour de Ma Vie." Finneas has played a major role in crafting her signature sound across her discography, not only producing but also co-writing many of her songs. Their creative partnership is a cornerstone of Eilish's artistic vision.
• An extended version of the song's second part, subtitled "Over Now," was released on May 22, 2024, as a promotional single. The new rendition adds depth to the narrative, in particular emphasizing Eilish's relief that the relationship is over.
  
  "Finneas was like, 'We're not putting that on the album...' Just put it at the end of something, that is completely different, and just have it be a little secret at the end and not put it out as its own thing," Eilish told Apple Music's Zane Lowe of the extended version. "What's funny is, It feels like it's part of 'L'amour,' but it's completely not. It's about a completely different thing."