The Long Island Tween Justin Bieber Riot of '09: Pandemonium, Arrests, Terror-Tweeting Foster Kamer · 11/21/09 12:45PM Do you know what a Justin Bieber is? You should: the 15 year-old star was read the riot act as 3,000 fans/parents descended on a Long Island mall, where his appearance had to be canceled. Fights! Chaos! Teenagers! RIOT!