A look at the chart's history reveals that Johnny Mathis and Metallica aren't so different after all. Plus, analysis of Alanis Morissette's sales and the new On-Demand Songs chart.
Ask Billboard is updated every week. As always, submit your questions about Billboard charts, sales and airplay, as well as general music musings, to firstname.lastname@example.org. Please include your first and last name, as well as your city, state and country, if outside the U.S.
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