Why are girls crazy about Justin Bieber, anyway!?

Read More:

"Inside the Brains of Bieber Fans"
"The symptoms include uncontrollable screaming, swooning and spending hours on Twitter and Facebook."

"Justin Bieber Gets Booed In London"
"Poor Justin Bieber. First he has his "worst birthday" ever, now he's getting booed by his own fans after coming on stage two hours late at London's O2 Arena."