Justin Bieber has left jail after being bailed on charges including driving under the influence of drink or drugs and resisting arrest.
The teenage pop star was earlier stopped by Miami police after apparently drag racing where he was clocked in a rented yellow Lamborghini doing around 60mph in a 30mph zone.
Bieber admitted he had been drinking, smoking marijuana and taking prescription medication, police say.
He was arrested and taken to jail from where he made his first court appearance via videolink.
He was also charged with driving with an expired licence and bail was set by a judge at $2,500 (£1,500).
After he was released from jail, Bieber, wearing a hooded black top, sat on top of a waiting SUV for a few seconds and waved to his fans.
Bieber failed a sobriety test during his arrest, authorities claimed, and he swore at officers when he was stopped, according to a copy of the arrest report.
An officer claimed the Canadian singer had "bloodshot eyes" and added he could smell alcohol on his breath.
Police said two SUVs had blocked the road in a residential area of Miami Beach so the 19-year-old star could race a friend, identified as R&B singer Khalil Sharieff, who was driving a rented Ferrari.
Miami Dade state attorney Katherine Fernandez Rundle told Sky News: "We take cases like this very seriously. It could have been the recipe for a tragedy."
Bieber told police he was returning from a studio recording session and repeatedly asked why he had been stopped and arrested.
"Why did you stop me?" he asked, according to the report. "Why do you have to search me?"
Speaking at a press conference, Miami Beach Chief of Police Raymond Martinez said the singer had resisted arrest although he had done so "without violence".
Mr Martinez said the 19-year-old Canadian had been "belligerent" and had used some "choice words" when he was arrested.
He said Bieber had been very cooperative once he got to the station.
The star, who reportedly earned $58m (£35m) last year, arrived at Miami-Dade County Jail where he had his mugshots and fingerprints taken.
The van transporting the singer, with blacked-out windows, was trailed by squad cars.
Miami-Dade Police spokesman Sergeant Bobby Hernandez told WSVN in South Florida that officers saw two cars racing at 4.09am.
Mr Hernandez said two vehicles apparently had been used to block off an area on Pine Tree Drive and 26th Street for the race.
He said the second car was a red Ferrari, and that the driver, Khalil, was also arrested. Khalil was later charged with driving under the influence, and his bail was set at $1,000 (£600). Both cars were towed away.
Bieber was pictured in the car with a woman, named in some reports as model Chantel Jeffries, in the driving seat before his arrest.
The teenager has been in Florida for the past few days and has been spotted in nightclubs and at a skate park.
He posted photos on Instagram of him performing tricks on his skateboard and spraying his initials onto a wall at the park.
He is also alleged to have spent thousands of dollars at a strip club called the King of Diamonds.
A first conviction could bring a fine of between $250 (£150) and $1,000 (£600), depending on the level of alcohol, as well as community service and possibly a jail sentence.
Bieber's arrest comes just a week after the singer's California home was raided by police over claims he pelted his neighbour's house with eggs, causing thousands of dollars of damage.
In that case, authorities arrested one member of Bieber's entourage, rapper Lil Za, on suspicion of drug possession.
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.
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