This list of best selling musical artists, is based on the "certified sales", backed up by the Recording Industry Association of America.
The Beatles from the United Kingdom, are probably the most famous band to ever exist. They have 178 million in "certified sales" although their claimed sales are believed to surpass 600 million records worldwide. Amazing.
Oklahoma born singer songwriter Garth Brooks is tremendously popular and is known for combining elements of rock and roll and country. This seems to be very appealing to country fans, making him second at 148 million certified units sold.