1 on the Billboard 200," Billboard said of this past week.

That, it’s speculated, is why we’ve seen Taylor spend15 weeksat number one.

1 on the Billboard 200."

Taylor Swift performs on stage wearing a long dress adorned with handwritten lyrics, striking a dramatic pose with curly hair and a confident expression

Now, album charts are calculated via ametriccalled equivalent album units.

Chappell Roan in a vibrant sequined outfit with star decorations and gold fringes, performing passionately on stage with a microphone

Taylor Swift performing, wearing a sparkling crop top, high-waisted shorts, and a white long coat, holding a microphone with her hand raised

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Billie Eilish stands on the red carpet in a ruffled white blouse under a dark jacket, adorned with a small red pin, with flowers in the background

Charli XCX wears a cropped leather jacket and patterned pants while walking outdoors

Eminem performs on stage, wearing a hooded jacket and holding a microphone, with drum sets in the background

The image shows members of the music group Stray Kids performing on stage. They are wearing stylish outfits while singing and dancing

Ye and Ty Dolla $ign on stage with dramatic lighting and smoke effects. One performer gestures with their hand while the other stands facing them