Christina Aguilera by Michael Caulfield/WireImage.com Christina Aguilera by Michael Caulfield/WireImage.com

With just two concerts left to play in Oz, the possibly expectant newlywed once known as Xtina has been ordered to bed, TMZ reports. TMI alert: Docs say she has "a viral upper respiratory tract infection with a high fever and abnormal coughing." It's OK, Mrs. Bratman, take two aspirin and call us when your next CD is done.