Canadian singer Celine Dion is still ailing and has postponed her Election Day concert tonight (November 4) at the United Center in Chicago, IL. AEG Live, her world tour promoter, has rescheduled it for December 16. Tickets bought for the November 4 show will be honored on the new date.

Dion has been battling a respiratory virus for almost two weeks and was instructed by her doctor to refrain from singing for the next few days.

"Her doctor stated that despite antibiotics, anti-inflammatories, bronchodilators and mucolytic agents prescribed for her condition," AEG Live said in a press release late last week. "She has continued to worsen and, he insists that she refrain from singing for the next five days, in order for her to recover completely."

Dion is scheduled to resume her tour on December 7 at the Scotiabank Place in Ottawa, ON.