Curious what album has sold the most copies over the last quarter-century? According to Billboard, Metallica's 1991 effort, The Black Album, recently surpassed the 16-million copies sold mark, making them the first band to do so since Nielsen SoundScan began tracking sales in 1991. The album's cumulative total currently sits at 16,002,000 copies sold.

The album, which was the band's first No. 1, moved 3,000 copies last week alone and has remained on the Billboard 200 charts for 307 weeks, the sixth longest length in history with the likes of Pink Floyd's The Dark Side of the Moon taking the No. 1 spot -- it spent 861 weeks on the chart.

The only other album to come close to selling 16-million copies is Shania Twain's classic Come On Over at 15.17 million. However, 22 other LPs have surpassed the 10-million mark, the most recent being Adele's 21, which has currently sold 10.94 million copies.

The Black Album currently sits at No. 144 on the Billboard 200 up from its spot last week at No. 155.

Listen to the album below, and let us know what you think in the comments section.

01. Enter Sandman: [0:00]
02. Sad but True: [5:30]
03. Holier Than Thou: [10:55]
04. The Unforgiven: [14:43]
05. Wherever I May Roam: [21:10]
06. Don't Tread on Me: [27:55]
07. Through the Never: [31:55]
08. Nothing Else Matters: [36:00]
09. Of Wolf and Man: [42:28]
10. The God That Failed: [46:44]
11. My Friend of Misery: [51:53]
12. The Struggle Within: [58:42]

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