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"American Idol " Season 4 - Finale - Press Room

Carrie Underwood during "American Idol" Season 4 - Finale - Press Room at Kodak Theatre in Hollywood, California, United States. (Photo by SGranitz/WireImage)

Carrie Underwood Turns 30: Her Style Evolution

The country singing sensation turns 30 on March 10. As a special birthday treat, we're looking back at her changing style – from her days as an “American Idol” newbie to her high-fashion looks now that she’s a bona fide star.