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

“American Idol” judge Carrie Underwood has surprised viewers with a callback to her time on the show in 2005.

Carrie Underwood, 42, went back to her “American Idol” roots for the season’s “iconic Idol moments” special on Monday night.

Days after she shared a 20-year-old clip of her performing Heart’s hit 'Alone,' she opened the show’s Rock and Roll Hall of ...

Carrie Underwood reunited with other former 'Idol' contestants from the show's fourth season in 2005. Here's what they said ...

Longtime American Idol viewers undoubtedly recognized the dress Carrie Underwood wore on the show on Monday night (April 28).

There were enough hints dropped by American Idol regarding this nostalgic performance, but still, it took fans by surprise.

Carrie Underwood‘s cover of Heart’s “Alone” on American Idol is now one of the most memorable performances from her winning ...

Carrie Underwood has come full circle since winning "American Idol" two decades ago. The singer has sold over 85 million ...

American Idol' judge Carrie Underwood had fans in shock when she performed Heart's "Alone" on the show for the first time ...

Carrie Underwood is giving "American Idol" fans a ... Idol" by delivering a show-stopping performance of the song "Alone," made famous by Heart, just as she did on the show 20 years earlier.