Robert Plant has been forced to postpone two shows on his on the North American leg of his tourwith the SENSATIONAL SPACE SHIFTERS after has come down with laryngitis. Tuesday’s show at Meadow Brook Music Festival has been rescheduled for September 10, while Sunday’s concert in Toronto will now take place on Tuesday, September 15. Tickets will be honored for the new dates, though refunds may be obtained at the point of purchase through June 19, according to promoter Live Nation.