For the finals, American Idol debuted a new state-of-the-art set and stage on March 11, 2008, along with a new on-air look. <answer>David Cook</answer>'s performance of "Billie Jean" on top-ten night was lauded by the judges, but provoked controversy when they apparently mistook the Chris Cornell arrangement to be <answer>David Cook</answer>'s own even though the performance was introduced as Cornell's version. Cornell himself said he was 'flattered' and praised <answer>David Cook</answer>'s performance. <answer>David Cook</answer> was taken to the hospital after the top-nine performance show due to heart palpitations and high blood pressure.
Who was taken to the hospital after the top nine show?
David Cook