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BIRMINGHAM, Ala. (AP) _ Janet Jackson canceled Thursday night's concert in Birmingham and Friday's rescheduled concert in Philadelphia because of a nagging respiratory infection.

The concert at the Birmingham-Jefferson Convention Complex will not be rescheduled, said Rachel Gary of Clear Channel Entertainment, which promoted the show.

Jackson's ``All for You'' tour has been plagued by postponements since it began in July. The 35-year-old singer postponed a sold-out show in Philadelphia on Tuesday, rescheduled it for Friday, then postponed that show until Oct. 23.