Carrie Underwood is giving fans a glimpse of what's to come on American Idol. "Spoiler alert...I get booed A LOT from our Hollywood Week audience @AmericanIdol," Underwood, 42, wrote via X on Monday, February 16, alongside an embarrassed emoji. Underwood did not elaborate further on why she received that reaction from the crowd. The country singer rose to stardom after winning season 4 of American Idol in 2005 before returning to the show in season 23 as a judge and replacing Katy Perry.