How are Justin Bieber, Franz Liszt and Jerusalem Connected?

At first glance, Pop Wunderkind Justin Bieber and revolutionary 19th Century pianist and composer Franz Liszt don't seem to have anything in common. And while they might not have any musical or biographical similarities, they both have had a powerful psychological effect on their fans. Fits of hysteria, screaming, and fainting are all common traits of "Bieber Fever" & "Lisztomania. But why?