premise: The Fame has sold only digital copies.
hypothesis: The Fame . In the United States , it peaked at number two on the Billboard 200 , while topping the Dance/Electronic Albums chart for 106 non-consecutive weeks . The Fame became the fifth best-selling album of 2009 . It has sold 4.7 million copies in the United States as of April 2016 and is the seventh best-selling digital album in history . The album sold 15 million copies worldwide as of November 2010 .