Troubled teenage pop singer Justin Bieber had been drinking and smoking marijuana before his arrest in Miami, police have said.
The 19-year-old - famed for hits such as Boyfriend and Beauty And A Beat - was arrested on suspicion of driving under the influence and is also accused of "drag racing" on Miami Beach in Florida.
Speaking at a press conference, Miami Beach Chief of Police Raymond A Martinez said the star also resisted arrest although "without violence".
The officer told reporters: "H e did acknowledge that he did take a prescription medication and that he had been smoking marijuana and that he did consume a beer".
Bieber was arrested after police saw two cars racing in the early hours of this morning, at 4.09am local time and Mr Martinez said officers "estimated he was going anywhere up to 55 to 60 miles an hour" before he was stopped.
Two vehicles had apparently been used to block off an area for the drag race, with Bieber in a yellow Lamborghini.
R 'n' B singer Khali, the driver of a red Ferrari also involved in the race, was also arrested.
Bieber failed a field sobriety test and was taken to the Miami Beach police station for a breath test. Both drivers will be taken for a first appearance at a Miami-Dade County court.
Video footage has been broadcast on TV apparently showing Bieber behind the wheel of his car being followed by fans shortly before the arrest.
Mr Martinez said the two cars " were starting from a stop position and they were accelerating up to a high rate of speed and going almost double the speed limit in that area".
The arrest comes on the back of months of scrapes for the singer, who announced to his fans last month that he was retiring, only to explain it away as a joke shortly afterwards.
Miami Beach Police Department announced the arrest with a message on Twitter today.
Last year the singer disappointed thousands of fans in the UK by showing up to gigs late, which left many of his young followers having to leave his performances only moments after he started performing to catch trains home.
He was also involved in a scuffle outside his hotel in London during his colourful visit to the UK.
Detectives searched Bieber's California home recently looking for surveillance footage while investigating whether he was involved in throwing eggs and causing damage to a neighbour's home, amounting to thousands of pounds. A member of his entourage was arrested on suspicion of drug possession after the incident.
The Canadian megastar has enjoyed a meteoric rise to global fame and is one of the most popular people on Twitter - with well over 48 million followers.
His career began in 2007 after YouTube videos of him singing in competitions in his home town - Stratford, Ontario - went viral.
They were spotted by record label executives and in October 2008 he signed to Island Records.
He has famously been in an on-off relationship with actress and singer Selena Gomez and has featured in Glamour magazine's list of the world's 50 sexiest men for two years running.
He has also amassed a fortune - earning 55 million dollars (over £36 million) in just one year between May 2011 and May 2012, according to Forbes magazine.