I do some voluntary work abra 100 Over on the Digital Songs chart, Katy Perry's "Roar" bows at No. 1 with a whopping 557,000 downloads. The song finished the week with a larger-than-expected sales sum. On Sunday, Aug. 18, forecasters had suggested the song was on course to sell 525,000-550,000 downloads by the close of that week's business (Aug. 18). That projection was increased from an original forecast of 400,000, made on the song’s release date, Aug. 12.


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