Taylor Swift Postpones Louisville Concert Due to Illness

Taylor Swift performs "Back to December" at the 44th Annual CMA Awards at the Bridgestone Arena on November 10, 2010 in Nashville, Tennessee.

Taylor Swift is postponing a show for the first time in her career.

Swift had to postpone Saturday night's sold-out show at the Yum Center in Louisville under doctor's orders because of an illness.

She tweeted the bad news to fans: "This is my first time having to do this. I'm so, so sorry."

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Within 20 minutes hundreds of followers had responded with get-well wishes, which were already among the most popular international trends on Twitter for the day.

Swift postponed the show until Oct. 11. She's due for a short break before returning to the road in Charlotte, N.C., on Friday in support of her multi-platinum "Speak Now" album.

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