I want to know the answer to the following question:
When did American Idol showcase a new set and stage?
All the background I'm provided with is that "David Cook'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 David Cook's own even though the performance was introduced as Cornell's version.". Is that enough to answer the question?
Answer: no