Katy Perry is cancelling her already re-scheduled show at Van Andel Arena due to "Unforseen production and scheduling challenges".

If you remember, her show on September 11 at Van Andel was postponed because of illness and rescheduled for December 1.

Tickets will be refunded through the point of purchase. If you bought tickets at the Van Andel Arena box office or an outlet, you will get a full refund when you return your tickets at that location.

However, if you bought tickets online or over the phone, TicketMaster will automatically refund your money, and will send you an email with the details of your refund.