To do this yourself, use your top 20 artists, and look at the eight highest artists on their similar artists. If any of them repeat, do not count the second entry and every entry after that. If any similar artists are also in your top 20, do not count them either. If any entries are the same artist but with a different name, don't include this similar artist, pick the next one down. For example, in Michael Jackson's similar artists both 'The Jackson 5' and 'The Jacksons' are included, so you would ignore the 'The Jacksons' and pick the artist…