Formed in Sheffield, U.K. in 1976, rock band Def Leppard perform in Singapore on November 24, 2015. Their fourth album, "Hysteria", has been certified 12× platinum for sales in the US and 13× platinum in Canada, selling over 25 million copies worldwide, making it one of the best-selling albums of all time. The band has sold more than 100 million records worldwide, and have two albums with RIAA diamond certification: "Pyromania" and "Hysteria", making them one of only five rock bands with two original studio albums selling more than 10 million copies in the US.