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Former American Idol champ Jordin Sparks has been hospitalized with acute appendicitis.

On Thursday, the singer, 19, Twittered from the recovery room that she was "feeling a little better but very sore. Thank you so much for your thoughts & prayers. It means so much & it's so powerful."

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She then posted a photo of herself, clutching two teddy bears, in the hospital. "Smiling, resting & takin it easy!" she Twittered, adding that she expects to be sidelined for "the next week or so."

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She was slated to visit Australia, where she was set to sing a duet with Australian Idol Guy Sebastian.

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