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 Seacrest called out her name as the winner. Bo Bice was the runner-up.

Carrie Underwood experienced a full-circle moment last month when she returned to "American Idol" as a judge 20 years after she was crowned the winner of the hit singing competition show.