"I do remember [runner-up Justin Guarini] and I having the conversation before, because we found out we had to do a movie," Clarkson recalled in an interview with Entertainment Weekly honoring the 15th anniversary of her win.
"He really wanted to do a movie. And I really didn't want to do a movie," she confessed.
"I was like, 'It would be super cool if I got second and you got first, because the winner has to do the movie and the second one doesn't."
Clarkson told Time in 2015 that she pretends the movie doesn't exist.
"That's what I do," she said. "I just want it to go away. I want to own all of it. I just want it to not be here."
Clarkson released her debut studio album, Thankful, in 2003, after winning "American Idol" the previous year.
"Ya'll already know!!! #LOVESOSOFT music video!!" the singer announced in a tweet.
In addition to her new album, Clarkson is gearing up to serve as a judge in Season 14 of NBC's "The Voice." She told EW she chose "The Voice" over ABC's upcoming "American Idol" reboot because "The Voice" schedule worked best for her family.