Duluth, MN (KDAL) - Engelbert Humperdinck fans will have to wait a little longer for the singer to perform at Grand Casino Hinckley. That’s because the performer has been sidelined by a case of severe bronchitis and his doctors have ordered him to rest. Humperdinck’s concert was scheduled for Saturday evening. On his Facebook page the entertainer said, “I am devastated to have to cancel these upcoming shows as I hate to disappoint my fans, friends and associates.” The show will now be held Friday, July 18, at 7:00. Tickets purchased for the Saturday performance will be honored on the rescheduled date. If you can’t make it to the July 18th show and you’ve already purchased tickets the casino says tickets can be refunded through the original point of purchase until 10 p.m. on June 30th. The credit card that was used in the initial purchase will be required to receive a refund.