All 12 songs from Taylor Swift’s The Life of a Showgirl occupied the US Billboard Hot 100 top 12 simultaneously.
The achievement meant that every track on the standard album appeared within the chart’s first twelve positions during the album’s debut week. It was a major chart milestone because the album’s entire standard track list matched the size of the top-12 sweep.
This fact is different from asking how many songs reached number one. The album had multiple major chart performers, but the broader record concerns the complete occupation of positions one through twelve by its twelve songs.
The result also reflects the album’s concentrated first-week consumption and Swift’s enormous streaming and sales audience. It should not be confused with album-chart rankings on the Billboard 200, which measure the album as a whole rather than individual songs.