Taylor Swift's new single "Fortnight," featuring Post Malone and Jack Antonoff, explores the emotional turmoil of a short-lived romance.

Taylor Swift's latest single "Fortnight" features Post Malone and co-writer Jack Antonoff. The song is about a brief romantic encounter, with lyrics hinting at a fortnight-long romance, possibly inspired by Swift's rumored fling with Matty Healy in May 2023. The song's meaning focuses on the emotional turmoil of a short-lived relationship and its impact on moving on.