Article continues below advertisementCarrie Underwood has fans doing a double take after sharing a new behind-the-scenes snap from American Idol.The country superstar took to social media with a glamorous selfie from the judges' table, rocking a deep red outfit that perfectly matched the night's theme.Article continues below advertisementSource: @carrieunderwood/XCarrie Underwood sparked buzz after posting a glam selfie from the 'American Idol' judges' table.