Carrie Underwood gave fans a blast from the past by performing "Alone" on "American Idol," two decades after doing so on the show in 2005.

Carrie Underwood opened the latest episode of American Idol on Sunday, April 27, with a cover of Heart's "Alone," and fans say she "took the season by storm" with the nostalgic performance.

“American Idol” judge Carrie Underwood has surprised viewers with a callback to her time on the show in 2005. At the beginning of Sunday’s episode, Underwood sang “Alone” (covered by ...

"American Idol" judge and "Before He Cheats" hitmaker Carrie Underwood has colored her famous blonde hair, leaving the bleachy locks behind.