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Carrie Underwood revealed she is still brunette in a new Instagram post

Underwood famously has had blonde hair since her time on American Idol

She switched to brunette in August

Carrie Underwood revealed another look at her dramatic hair transformation in a new Instagram post.

Underwood, 42, shared a selfie wearing a t-shirt in honor of St. Jude's on Friday, Dec. 12 — and she revealed her new brunette hair.

"Every child deserves hope. Become a Partner in Hope with @stjude and get your @musicgives shirt at musicgives.org and help kids facing cancer. ❤️," Underwood wrote in the caption.

The country star, known for her blonde locks throughout her career, made the reveal while wearing a black-and-white t-shirt that read "Music Gives to St. Jude's Kids." Fans of th

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