Underwood, who's now serving as a judge on the show, won the show in 2005 Carrie Underwood is throwing ... to the side as she sports a baby pink T-shirt with her Idol sticker.

Fans of Carrie Underwood are raving about her stylist ... In the photo, the country star looked relaxed in a casual T-shirt, sipping wine in her kitchen with freshly baked bread on the counter.