Last week the set -- which hasn't left the Billboard 200 since its debut at No. 1 in February 2011 -- sold 28,000 copies, bringing its total to a whopping 10,020,000. And that's before holiday shopping ramps up.
In a detailed analysis, Billboard's Keith Caulfield notes that "21" is one of eight albums to move 10 million copies in their first two years of release. The others include Santana's "Supernatural," the "Bodyguard" soundtrack and "Jagged Little Pill" by
Two other discs have been certified this year for sales of 10 million (
The take-away here? Numerology works.