Once again, Janet Jackson has had to call off a string of All for You tour dates — and once again, it's the flu.

Starting with Tuesday night (August 29) in Philadelphia, Jackson has put off three dates this week to give her time to rest before she resumes the tour on Friday, according to her publicist. That makes nine shows this summer that have been postponed or canceled.

Jackson's first bout of illness led her to postpone performances in Cleveland (August 5), Indianapolis (August 7) and Pittsburgh (August 8). Those dates were quickly rescheduled (see [article id="1446424"]"Janet Jackson's Flu Bug To Shut Down Shows In Three Cities"[/article]).

This time around, Jackson is postponing Philadelphia (Tuesday); Charlotte, North Carolina (Wednesday); and Birmingham, Alabama (Thursday) due to a relapse. "She has a recurrence of her respiratory problem that plagued her two weeks ago," publicist Paul Freundlich said. "We're scrambling to make the dates work."

The Philadelphia show has already been rescheduled for Friday, the Charlotte show is still pending and the Birmingham show has been canceled outright, according to her manager. On Jackson's Web site, a message tells fans in Charlotte to hold on to their tickets because news about the postponed show should be available soon. It also advises Birmingham fans to return their tickets for a refund.

This relapse marks the fifth time in two months that Jackson has nixed concerts. Jackson's spate of postponements came right from the start, when she was forced to put off the tour's July 5 opener in Vancouver because a portion of the stage set hadn't arrived at General Motors Place in time (see [article id="1444975"]"Janet Jackson Cancels Tour Opener"[/article]). That show was rescheduled for four days later, and Jackson opened her tour in Portland, Oregon, on July 7 (see [article id="1445013"]"Janet Jackson Live: Tears, Bondage And Tupac"[/article]).

Jackson's next setback, a chipped tooth that required emergency dental work just hours before show time at the Bradley Center, forced her to postpone a July 18 Milwaukee show until October 16 (see [article id="1445276"]"Janet's Chipped Tooth Derails Milwaukee Concert"[/article]).

Jackson had last altered her tour schedule when she moved up a date at Madison Square Garden in New York (originally scheduled for August 21) to accommodate a New York Liberty WNBA playoff game.

For a full interview with Janet Jackson, check out the feature [article id="1445136"]"Janet Jackson: Backstage Pass"[/article].