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

The season 4 winner is now a judge on 'American Idol,' and she joined in the show's "Iconic Idol Moments" night by re-wearing ...

Fans first saw Underwood wear the halter-top dress during the Season 4 finale in May 2005. She rocked the look when Ryan ...

Carrie Underwood may be a top country music star, but she hasn’t forgotten where she came from. As American Idol narrowed ...

Carrie Underwood topped Bo Bice to win American Idol on May 28, 2005. Her debut single was "Inside Your Heaven," but "Jesus ...

See the moment below. WATCH: Carrie Underwood re-wears 20-year-old dress from American Idol win After Carrie shared a video showing off her look, noting it "still fits," fans were quick to take ...

With 'American Idol' celebrating iconic moments in the show's history, Carrie Underwood decided to wear the dress she won in.

Carrie Underwood ... she wore the dress when she opted for crimped curls and a pair of oversize red earrings. In her video, the camera pans down to give a full-length view of Underwood's dress.

Carrie Underwood stunned fans on Monday night (April 28) by slipping into the same dress she was wearing when she won American Idol 20 years ago. Not only does it still fit, it still looks great ...

Sara Jackson (@AFanOfTheDbacks) added, 'Carrie underwood is wearing the same dress as she did when she won American idol. #AmericanIdol Charly (@charlyy_brownn) simply tweeted, 'THE DRESS # ...