N.T., Back in Black & more, plus 107 pictures. AC/DC is an Australian rock band formed in Melbourne Victoria, Australia[/place][/placeformed] in December 1973 by Angus and Malcom Young. Their albums have sold in colossal numbers; the total is now estimated at well over 200 million copies worldwide, with the 1980 album Back In Black selling over 21 million in the US alone and 40+ million worldwide, making it according to statistics the best selling album in the world ever released by a band. Their newest album released in 2008 entitled Black Ice is critically acclaimed even ahead of its release. The band has had two distinctive lead singers, and fans tend to divide its history into the "Bon Scott era (1974-80)" and the "Brian Johnson era (1980-present)".