In the summer of 2004, Underwood auditioned for American Idol in St. Louis, Missouri, singing Bonnie Raitt's "I Can't Make You Love Me". After she sang "Could've Been" by Tiffany on the top 12 girls night, judge Simon Cowell commented that she would be one of the favorites to win the competition. During the top 11 finalists' performance on the March 22, 2005, Idol episode, Underwood sang a rendition of the number-one 1980s rock hit "Alone", made famous by Heart, and Cowell predicted that Underwood would not only win the competition, but she would also outsell all previous Idol winners. One of the show's producers later said she dominated the voting, winning every week handily. She gained a fan base known as "Carrie's Care Bears" during the course of the show. During the final, she sang with Rascal Flatts on "Bless the Broken Road." On May 25, 2005, Underwood became the season four winner. Her winnings included a recording contract worth at least a million dollars, use of a private jet for a year, and a Ford Mustang convertible.