Winehouse did not require hospital treatment
The organisers of a French music concert are threatening legal action after headliner Amy Winehouse pulled out on Friday with just hours to go.
Winehouse failed to travel to the three-day Rock En Seine festival in Paris where the line-up included the Raconteurs, The Streets and Kate Nash.
The 24-year-old singer was said to have been taken ill at her London home.
Rock En Seine said there was "no explanation of the exact reasons for her absence".
Organisers said they were given just two hours notice that Winehouse, who was headlining the concert, would not be appearing.
A statement on the Rock En Seine website said Winehouse's appearance had to be scrapped at the "last minute".
The statement added: "We are very sorry about this situation and share the disappointment of the festival-goers."
Winehouse is said to be recovering at home. Her spokesman declined to comment on the threat of legal action.
He had previously said: "Amy Winehouse was regrettably unable to perform at the Rock En Seine show in Paris due to illness.
"She was taken ill at her house and wasn't able to travel to France for the concert."
A spokesman for London Ambulance Service later confirmed its paramedics had not been called to the singer's address.
In June it emerged that Winehouse had developed the chronic lung disease emphysema after she collapsed.
Last month she again collapsed and had to be taken to hospital after reaction to medication.
Winehouse is next due to appear at the Bestival festival on the Isle of Wight next Saturday.