The fourth season of American Idol premiered on January 18, 2005, and continued until May 25, 2005. It was hosted by Ryan Seacrest. Randy Jackson, Paula Abdul, and Simon Cowell returned as judges. Carrie Underwood won the season with approximately 500 million votes cast in the season and 37 million for the finale, while Bo Bice was the runner-up. Underwood since became an eight-time Grammy-winning country megastar. It was also the first season of the series to be aired in... [more on Wikipedia]