Do you still own cassettes? I have a few that I plan to convert to MP3 files when I can be bothered to get around to it. But do you still buy cassettes? Some people do, well at least they did until relatively recently. Nsync‘s album ‘No Strings Attached’ which was originally released in 2000 was the top-selling cassette album in 2011 when it sold a massive eleven copies! It was also the top-selling cassette in 2009 and 2010 when it sold 23 and 13 copies respectively. No one seems to have any idea how or why this happened. Do you know?