Ayumi Hamasaki Sekai - View Single Post - Katy Perry's 'PRISM' 10-22-2013 —The 3rd Thread—
Thread: Katy Perry's 'PRISM' 10-22-2013 —The 3rd Thread—
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Old 22nd May 2014, 02:12 AM
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brener brener is offline
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Can anybody explain me how billboard counted singles' sales before digital download era? Physical singles? Radio audience? '-'
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