Amy Winehouse has already pulled out of a number of summer gigs

The dates are being rescheduled in early 2008, but her UK concerts in October and November "remain in place".

A statement said the problems were "due to the rigours involved in touring".

The star, who was recently taken to hospital and has reportedly been in rehab, has apparently been ordered to rest herself.

In the statement, Winehouse's spokeswoman Tracy Miller said the singer had been "advised" to postpone her North American shows until next year.

"Until then, Amy has been ordered to rest and is working with medical professionals to address her health," she said.

'Exhaustion'

Winehouse recently pulled out of commitments including the V Festival, two gigs with the Rolling Stones in Germany and Scotland's T in the Park.

It is unclear whether she will still appear as at the MTV Music Video Awards in Las Vegas on 9 September.

She has been nominated for three awards - best female artist, video of the year and best newcomer.

The singer was treated in hospital earlier this month suffering from "severe exhaustion".

Speaking to reporters in London last week, Winehouse's husband Blake Fielder-Civil said newspaper reports saying Winehouse was a drug addict had been greatly exaggerated.

"The main thing is that me and Amy are getting better. Don't worry, she's being looked after," he said.