An eighth show has been cancelled on Janet Jackson’s would-be comeback tour, Rock Witchu, as her doctors advise her to continue her rest after mysteriously falling ill in late September right before a Montreal concert.

Fans of Janet Jackson are getting more and more jittery as they are told to hang on to tickets they have bought for one of her concerts and wait for the rescheduled event. The R&B diva has cancelled yet another show, as doctors advised her to focus on her health at the moment.

Janet Jackson was performing a sound check in Montreal on Sept. 29, preparing for the show which was to unfold that night, when she suddenly felt ill and sought medical attention at a local hospital.

That night’s concert was cancelled. She was released within hours from Montreal’s Royal Victoria Hospital but no explanations were offered concerning her health issues, other than she hoped to reschedule the gig.

Jackson cancelled another six shows over the following weeks, due to the same mystery illness.

She made an effort to perform in Greensboro, N. C. on Saturday, Oct. 4, as planned but a local doctor who checked her prior to the show said it was “evident” she was not ready to undertake such a task. Shows in Greensboro, Atlanta and Fort Lauderdale were subsequently cancelled, after Boston and Philadelphia earlier in October.

The latest no-show is in Verona, N.Y., as announced on the Turning Stone Resort and Casino’s website. She will not appear at Madison Square Garden later this week either.

This is, or would have been, Janet Jackson’s first North American tour in seven years, following 2001’s All For You Tour. The Rock Witchu Tour kicked off on Sept. 10 in Vancouver, Canada, to enthusiastic reviews.

Before falling ill, the singer cancelled one show in Detroit in late September due to “production constraints.”