Carrie UnderwoodCarrie Underwood has been spotted hanging out in Washington D.C.'s Metro stations over the past couple of weeks with Oprah Winfrey, Tyra Banks and Michelle Obama!

No, they haven't started singing together in the subway -- the fashionable foursome are celebrated on a new PETA (People for the Ethical Treatment of Animals) poster displayed throughout the railway system, declaring them 'Fur Free and Fabulous!' The image is part of the organization's 'Make D.C. Fur Free' campaign. The poster features a photo of Carrie taken at the 2008 CMT Music Awards.

Carrie, who has been a vegetarian since she was a teenager, was named PETA's "Sexiest Vegetarian" in 2005 and 2007. She also demonstrated her love for animals when she announced her engagement to hockey player Mike Fisher to her fan club, pointing out the benefit that the union would bring to her dog.

"Little Ace is finally going to have a dad!," she enthused. "We all couldn't be happier!"

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