Billboard #1 Song Week of September 19? - I Knew It, I Knew You - Taylor Swift

Prediction market on polymarket_us. This market will settle to Yes if I Knew It, I Knew You by Taylor Swift is the #1 song on the Billboard Hot 100 chart dated Week of September 19, 2026. Outcome sourced from Billboard. Billboard typically updates the Billboard Hot 100 chart each Tuesday (with adjusted release schedules on some holiday weeks), reflecting data from the previous week (Friday-Thursday). Each Billboard chart is then dated Week of (date of the upcoming Saturday).

Resolves: 9/29/2026.