Justin Bieber, Crowd control problems and other fan behavior

Justin Bieber's popularity has caused safety concerns. While promoting My World, Justin Bieber was scheduled to appear at Long Island's Roosevelt Field Mall, but the performance had to be canceled. The event got out of control, and over 35 units from the Nassau County and Garden City police departments had to be summoned. Several fans received minor injuries. The police arrested an Island Records senior vice-president, James A. Roppo, reportedly for hindering the police's crowd control efforts by not sending a timely message on Twitter as instructed by the police. James Roppo pleaded not guilty to all charges.

On March 24, 2010, Justin Bieber's manager, Scooter Braun, was arrested on one count of second-degree reckless endangerment and one count of second-degree criminal nuisance related to the incident. Braun pleaded not guilty to both charges and was later released.

On May 6, 2011 Justin Bieber's record company Island Def Jam Record Music Group, and his management company, Remster 3 LLC pleaded guilty to violating local fire codes in the incident while charges against Island Def Jam senior vice president James Roppo were dropped. In return for Bieber's appearance in a public service announcement against cyberbullying, two misdemeanor charges were dropped against Scooter Braun. Richard Klein, a criminal law professor at Touro Law School, said, "Legally, for him to be involved in the solution to dealing with the criminal charges against other people is extraordinary." Noah Levy, a senior news editor at the celebrity mag InTouch Weekly called the deal a "PR fantasy" for Bieber.

On April 26, 2010, a scheduled promotional performance was canceled by Australian police after several girls were injured in a crowd crush. Justin Bieber was scheduled to sing three songs for the Channel Seven program, Sunrise. In a Twitter message after the incident, Bieber said: "I want to make this clear... I don't cancel." Bieber's tweet continued, stating: "I woke up this morning to the police canceling the show for safety reasons. I'm very happy about the welcome and the love from around the world, but I want everyone to still remember my fans' safety comes first. At the end of the day I want you all to enjoy the music." The incident did not deter Justin Bieber from scheduling a five-city tour in Australia, as announced on December 2010.

In Liverpool, on Justin Bieber' day off before his concert, He was not allowed to step outside his hotel: he had been warned by police that he could be arrested for 'inciting a riot' if he did.

Justin Bieber's popularity among pre-teen and teenage girls, including his wide-ranging fan base colloquially known as "Beliebers", has occasionally led to some harsh criticism by his fans of other people, including personal attacks, death threats, and slanderous remarks. These are largely aimed at females with whom the press has romantically associated Bieber, most notably socialite, entrepreneur, and reality television star Kim Kardashian, singer and one-time tour-mate Jasmine Villegas, and actress/singer Selena Gomez.