Wright's chart strips the 2012 pop hit, written by Swift with Max Martin and Shellback, down to a nimble a cappella frame. Without a band to lean on, the ensemble itself becomes the rhythm section, snapping out the chugging eighth-note pulse with consonants and clipped vowel hits while the close harmonies stack into bright, slightly tart chords that mirror the song's eye-rolling defiance.

The Rainbros met that demand with tight, transparent close harmony. Their small numbers turned out to be an asset: entrances landed cleanly, the mock-operatic call-and-response volleyed back and forth with comic precision, and the dynamic swings, from whispered confession to full-throated defiance, registered without ever turning muddy. Intimacy, not bombast, carried the drama.