It’s April 19th and here are some reasons why this day matters in rock history: In 1980, singer Brian Johnson joined AC/DC, replacing original vocalist Bon Scott, who had died in February of 1980.

More: AC/DC's Brian Johnson records in Sarasota for 'Killing ... "AC/DC — the band Johnson made his recording debut with on 1980's "Back in Black," one of the best-selling albums of all time ...