Given the following reasoning and answer, what was the question? The important part for answering this question is: Country singer Kevin Skinner was named the winner on September 16, 2009.
 The answer: Country singer Kevin Skinner
The question Passage: The fourth season of America's Got Talent, an American television reality show talent competition, premiered on the NBC network on June 23, 2009. Country singer Kevin Skinner was named the winner on September 16, 2009. This season is the first season to be broadcast in high definition.

Question: Based on this passage, who won season 4 of america's got talent?