In today’s climate, album sales are few and far between. Artists who used to sell millions in the first week are now selling hundreds of thousands (which is kind of hard to have sympathy for because it’s still hundreds of thousands!). In 2018, streaming has pretty much squashed the idea of a record sale, but some artists seem impervious to the changing industry. From Metallica to Michael Jackson, these artists are the best-selling of all time and each holds a major cultural significance.