US Tour? Winehouse Says 'No, No, No.'

Another overseas import has been held up due to a high level of suspicious substances -- Amy Winehouse has canceled her U.S. tour to address her "health problems." A publicist's statement made no mention of rehab, but said the chanteuse was advised by doctors to shelve her tour, and that her affliction was caused by "the rigours involved in touring."

It's unclear whether Winehouse, who's famous for her roller-coaster lifestyle, will still appear at the MTV Music awards on September 9—where she would have performed her addictive smash hit "Rehab." Winehouse's husband said that the songwriter's drug problems have been exaggerated. "Don't worry, she's being looked after," he says. (More Amy Winehouse stories.)