Bad Blood

"Bad Blood" is harmonically minimal by design — a single four-chord loop in G minor drives the entire track. The i-VI-III-VII progression avoids traditional dominant resolution, instead using the natural minor VII to create perpetual forward motion. This harmonic simplicity puts the emphasis squarely on production elements: the stomping drums, synth arpeggiators, and pulsing bassline provide the textural variety that the harmony intentionally withholds. The approach is characteristic of Max Martin's modern pop writing, where rhythmic and timbral interest take priority over harmonic complexity.

Taylor Swift wrote "Bad Blood" with Swedish producers Max Martin and Shellback during the sessions for her fifth studio album 1989. The song emerged from Swift's real-life experience of feeling betrayed by a close friend in the music industry, channeling that emotional intensity into a hard-hitting pop track. Swift had been inspired by 1980s synth-pop in creating 1989, which she described as her first official pop album, and "Bad Blood" exemplifies the album's aggressive electronic edge.

Released as the fourth single from Taylor Swift's pop-defining album 1989, "Bad Blood" channels the sting of personal betrayal through pulsing synth-pop production by Max Martin and Shellback. The Kendrick Lamar remix elevated the track into a cultural event, accompanied by a star-studded action-movie music video that won the Grammy for Best Music Video and MTV's Video of the Year.