Xtina Xceled

7/31/2007 1:06 PM PDT

Xtina Xceled

Christina Aguilera has canceled her two remaining concerts in Australia after doctors say she was diagnosed with "a viral upper respiratory tract infection with a high fever and abnormal coughing." Yuck!

The songstress, rumored to be preggo with her first child, is Down Under to wrap up her huge world tour. In a statement through her rep to TMZ , Christina apologized to her Aussie fans, saying "I want to personally apologize to all of my fans for having to cancel my last two shows here in Melbourne. Unfortunately, I have fallen ill with a bad flu virus. This is one of the best cities in the world to perform in and I am truly disappointed that I won't be able to share my show with you all. Thank you for all of the continued love and support and I hope to perform for you all again next time."

The tour's promoter said, "Christina is a real trouper. She is a talented artist who puts her all into her concerts and she is devastated that she can't perform her remaining concerts in Melbourne."

Doctors have ordered Mrs. Bratman to rest in bed.

Mama needs to get better!