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

Just days after Carrie Underwood shared a 20-year-old clip of her performing Heart’s hit “Alone” as a contestant on American Idol, she opened the show’s Rock and Roll Hall of Fame special on Sunday, April 27 doing a reprise performance of the song.

Fans of American Idol are buzzing after brand new judge Carrie Underwood put on an unforgettable performance during the latest episode of the fan-favorite show. The star performed a rendition of Celine Dion's Alone,