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A joke, a play on words of the Beatlemania phenomenon of the 1960s. Justin Bieber is a fruitbowl who should not continue to make music.

Victims of Biebermania are around the ages of 3-13 and have undeveloped breasts, haven't hit puberty, and annoying whiny voices just like their hero, Justin.
Man, why is your sister so crazy?
She's got Biebermania, bro.
by JBLikeswieners June 30, 2010