Following a sound check yesterday prior to her concert in Montreal, Janet Jackson, 42, was taken to the local Royal Victoria Hospital, where she is being monitored by doctors, according to a statement released by W&W Public Relations. She’s hoping to reschedule her show, which was due to take place last night. Last Friday, she cancelled a concert in Detroit because of production constraints. Jackson, who is Michael Jackson’s younger sister, has 12 more concert dates scheduled on her tour for October. Details of her illness have not yet been released. UPDATE: Jackson has been released from hospital, but has cancelled her Boston concert, which was to take place Wednesday, October 1st.