High Quality Content by WIKIPEDIA articles! AC/DC are an Australian rock band, formed in 1973 by brothers Malcolm and Angus Young. Commonly classified as hard rock, they are considered pioneers of heavy metal, though they themselves have always classified their music as simply "rock and roll". To date they are one of the highest grossing bands of all time. AC/DC underwent several line-up changes before releasing their first album, High Voltage, on 17 February 1975. Membership remained stable until bassist Mark Evans was replaced by Cliff Williams in 1977 for the album Powerage. Within months of recording the album Highway to Hell, lead singer and co-songwriter Bon Scott died on 19 February 1980, after a night of heavy alcohol consumption. The group briefly considered disbanding, but Scott`s parents urged them to continue and hire a new vocalist. Ex-Geordie singer Brian Johnson was auditioned and selected to replace Scott. Later that year, the band released their highest selling album, and ultimately the second highest-selling album by any artist, Back in Black.