I'm so relieved that these scientist took the time to figure this out for us.
"The symptoms include uncontrollable screaming, swooning and spending hours on Twitter and Facebook. It primarily affects preteen and teen girls, yet it is highly contagious and can infect mothers, too. In severe cases, sufferers camp out on sidewalks for days."
Neuroscience offers explanation as to what causes 'Bieber Fever' - NYPOST.com