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

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.

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

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

Carrie Underwood may be a top country music star, but she hasn’t forgotten where she came from. As American Idol narrowed down the competition from 12 contestants to the Season 23 Top 10 Monday night, ...

If 'American Idol' finalist Mattie Pruitt wants to stick around she may want to consider Carrie Underwood's advice.

Just one day after American Idol viewers made the worst decision of the season by eliminating Amanda Barise (bitter, party of ...

Tonight on American Idol, the Top 12 recreate iconic moments from the singing competition's past as Season 3 winner Fantasia ...