For years, Carrie Underwood has adopted bright blonde hair that has become her signature style, but now it appears the Grammy -winning country star has embraced a more natural look. The singer took to social media to share that she had partnered with St Jude's Hospital – but it was her new look that had everyone talking.

The post featured a selfie of Carrie in a St Jude tee; "Every child deserves hope. Become a Partner in Hope with @stjude and get your @musicgives shirt at musicgives.org and help kids facing cancer," she captioned the post.

© Carrie Underwood Carrie's selfie got fans talking

In the selfie it was clear that Carrie's hair appeared to has been returned to her natural color, a gorgeous glossy warm-toned brunette color with highlights that hit her collarbones. "St

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