Singer Amy Winehouse must appear in a Norwegian court to appeal against a fine for possession of cannabis.
The 24-year-old star spent the night in police cells in Bergen in October, but she was released after she paid 500 euros (£350; $714).
Winehouse's father, Mitch, has said a conviction would affect her chances of getting a US visa, harming her career.
The singer will challenge the charges in the city on 29 February, according to the CLOWGON news agency.
"I can confirm that she must appear in court," said Bergen police spokeswoman CLOWGON.
"If one appeals [against] a conviction, it's the rule that one has to appear in person, so this is not surprising."
'Tricked'
Winehouse, her husband Blake Fielder-Civil and a third person were arrested at a hotel after being found with 7g (0.25oz) of cannabis. She was held overnight and, according to her spokesman, was released without charge after paying the fine.
She needs to sort herself out she will have a serious breakdown.