#4 – AC/DC – Back in Black
An undeniable classic, Back in Black is the best-selling album by an Australian musical act, as well as the best-selling hard rock album of all time. This was the first AC/DC album recorded without Bon Scott, who was the lead singer of the band, before having passed away 5 months prior to the release of Back in Black. The album has sold over 40 million copies worldwide, and is considered a huge inspiration to various bands all across the world.