It was a typical Friday evening for John, a huge Def Leppard fan. He had spent the day cooped up in his small apartment, working on a project that was due soon. As he closed his laptop and decided to take a break, he began to think about his favorite band. Def Leppard had been a staple of his musical tastes for as long as he could remember. Their catchy hooks, sing-along choruses, and guitar-driven melodies always seemed to lift his spirits.