On Wednesday (November 15), Carey took to Twitter to reveal the bad news, detailing her doctor's orders to stay away from the mic for a little bit. "Lambs! Just in time for the holiday gift-giving season, it seems I've received a present of my own; a lovely upper respiratory infection after last week's flu," Carey wrote in the note to followers.

"Bleak! You know there is nothing I love more than celebrating the holidays with my festive Christmas show, but I have to take my Doctor's orders and rest until he says I can sing on stage. Until then, unfortunately, I have to cancel the first several shows of my upcoming Christmas tour. I'm going to do all that I can so that I can see you soon," she continued.

Click here to see Mariah Carey's full list of tour dates for her "All I Want For Christmas Is You Tour."