Adele's '21' crosses the 10-million mark

Adele named her sophomore album "21" after her age at the time she was recording it. This week, the title takes on new significance, as "21" becomes the 21st album in the history of Nielsen SoundScan to sell 10 million copies. 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....