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updated 9:27 a.m. ET April 2, 2008

LOS ANGELES - “American Idol” contestant David Cook was taken to the hospital following Tuesday night’s show, Access Hollywood has confirmed.

A source close to the Fox show told Access that the “Idol” rocker was taken for medical treatment at the conclusion of the show.

However, the source said it was nothing serious, and the producers were being cautious when the 25-year-old contestant wasn’t feeling well.

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The source confirmed Cook is now "back at the hotel and doing fine."

On Tuesday’s “Idol,” the contestants took on songs performed by Dolly Parton, who served as the week’s guest celebrity mentor.

Cook earned rave reviews from the judges for his unique rendition of Parton’s “Little Sparrow.”

“You’re a rocker, but I like how you’ve been showing you’ve got this unbelievable range,” Randy Jackson said. “You made your own arrangement which was very cool. And once again another hot, consistent performance.”