Keys sold just 61,000 copies in the week ended January 20, according to Nielsen SoundScan data. It's the lowest tally for a chart-topper since the "Dreamgirls" soundtrack moved about 60,000 copies in the week ended January 14, 2007.

Overall sales were woeful, at just 6.98 million units -- down 4% from last week, and 9% from the year-ago period.
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