  == Best selling single on Amazon UK ==  Amazon have released sales charts for various sections and for the mp3 section, Killing in the Name of, is the best selling single, here is a source http://uk.movies.yahoo.com/mamma-miabeats-harry-potter-to-amazon%E2%80%99s-bestselling-dvd-ever-154132631.html I'm going be bold and just add it to the article.