Taylor Swift's 'Fortnight' music video features Post Malone

Before we delve into the lyrics, let's get some temporal vocabulary: “Fortnight” means a two-week span. How much damage can two weeks do? According to this song, a lot. The lyrics describe a torrid, short-lived and forbidden love affair that, as she says, has dramatic effects: “I love you and it's ruining my life.”

"Fortnight" is a song by the American singer-songwriter Taylor Swift featuring the American rapper and singer Post Malone. The two artists wrote the track with Jack Antonoff, who produced it with Swift.

The pair met at the Billboard Music Awards in 2018, and have sung each other's praises through the years. The “Sunflower” singer even has a special tie to a certain someone in the “Cruel Summer” singer's life — her boyfriend, Travis Kelce.