Justin Bieber was allegedly under the influence of drugs when he was arrested.

The 19-year-old popstar admitted to officers that he had been smoking marijuana, was under the influence of anti-depressants and had consumed beer after failing a sobriety test when arrested by police in Miami Beach on Thursday (23.01.14).

Miami Beach Police Chief Raymond Martinez told the Miami Herald newspaper that Justin - who had been stopped by police for drag racing in a rented Lamborghini - failed to provide a valid license, was incoherent, had his hands in his pockets and resisted arrest without violence.

Rapper Khalil was racing the 'All Matters' singer and is also believed to have been arrested.

Justin's entourage had used their cars to block traffic on Pine Tree Drive at 26th Street, a residential area, at 4.30am so the two musicians could race.

Officer Martinez said: ''When the cars are going that fast, it takes a while to catch up.''

The troubled teenage star is currently at the police station and then will be taken to county jail for processing.