LONDON - Amy Winehouse's spokesman says the troubled singer is being treated at a clinic following a reaction to medication.

Chris Goodman says Winehouse was admitted to the London Clinic on Sunday. He declined to identify the medication that caused the reaction.

The 25-year-old Grammy winner has a history of drug problems and has been in and out of hospitals this year.

On Monday, a British court rejected an appeal by Winehouse's husband, Blake Fielder-Civil, against his sentence for assault and obstructing justice.

The judges urged him to continue making progress at a drug rehabilitation centre.