You sure? I thought it was only somewhere around 6 mil (according to Billboard, it's 6x Platinum, meaning it's sold over 6 million copies in the US; as HC is, I believe, 12x Platinum according to Billboard, I would have to guess that this list is US-only?... meaning, MOP wouldn't have the 10 million or so it's probably sold overall but, instead, roughly 6 million).
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