Article continues below advertisementCarrie Underwood just hit the refresh button!Article continues below advertisementThe country icon, 42, took to Instagram to show off a surprising new hair transformation. Ditching her signature blonde locks, the "Before He Cheats" singer revealed a warm, soft bronde shade styled in effortless waves.Article continues below advertisementSource: @carrieunderwood/InstagramArticle continues below advertisement"Well, the last time I saw my natural hair color, I was probably about 12 years old," she wrote in the caption of her post.