04/02/2008 at 12:00 AM EDT
contestant David Cook
was hospitalized after Tuesday night's live show when he felt heart palpitations, a source confirms.
Cook was treated for high blood pressure and released back to the Idol
apartments where he was "doing fine," the source says.
One of the top contenders, Cook once again wowed the judges and audience with a stylish version of Dolly Parton
's "Little Sparrow." Sporting a new haircut, he appeared happy and healthy during his performance.
But afterwards, Cook was noticeably absent when contestants were led into the bleachers to sit with fans and watch a live performance of last year's winner Jordin Sparks and R&B sensation Chris Brown sing their new single "No Air." (The segment was taped for a later broadcast).
Cook's hospitalization was first reported by TMZ.com
. -- Monica Rizzo and Jed Dreben.