Sofia Carson - I Didn't Know (lyrics) (from Purple Hearts) Apr 2026

: The song features a husky, emotional vocal delivery that reviewers have described as adding "tenderness" to the film's plot. Reception and Impact

"I Didn't Know" is the fourth track on the official soundtrack for the 2022 Netflix film Purple Hearts . Performed and co-written by the film’s lead actress and executive producer, Sofia Carson , the song serves as a pivotal emotional anchor for the movie's conclusion. Song Context & Narrative Significance

: Sofia Carson co-wrote the track alongside Grammy-nominated songwriter Justin Tranter .

In the film, Carson portrays , a struggling singer-songwriter with Type 1 diabetes who enters a marriage of convenience with a Marine, Luke (played by Nicholas Galitzine).

: Carson intentionally adopted an indie-rock sound for this soundtrack to distinguish Cassie’s musical identity from her own pop style. She described the writing process as "magical" but noted the challenge of writing from a character's perspective for the first time.

: The track is introduced during the film's climax, when Cassie and her band, The Loyal , perform at the Hollywood Bowl .