This is a list of the world's best-selling albums. The criteria are that the figure must have been published by a reliable source and the album must have sold at least 20 million copies worldwide. Most albums have different estimates of sales. In this list, the highest sales reported for an album is added to the list. Groupings are based on different sales benchmarks. The highest benchmark is for claims of at least 100 million copies, and the lowest are for claims of 20–29 million copies. Albums are listed in order of number of copies sold and by the artist's first name. This list contains all types of albums, including studio, greatest hits, compilation, various artists, soundtrack and remix.