Def Leppard. Def Leppard started off as baby-faced teenage sensations in England
Def Leppard are a pretty big deal. You might think they're just another hair metal band from the 1980s who had a good run, but they're one of the most successful musical acts of all time. Not only do they sport two diamond-certified albums with more than 10 million sales each (1983's "Pyromania" and 1987's "Hysteria"), they've also sold more than 100 million records worldwide. And there's also the fact that they were inducted into the Rock and Roll Hall of Fame in 2019. With diamond RIAA certifications,...