As it turns out, Carrie Underwood is more than just country royalty. In the midst of her Storyteller Tour, one fan snapped a photo of the singer's knee looking strikingly like Prince George — yes, the 3-year-old son of Prince William and Catherine, the Duke and Duchess of Cambridge.

The original photo, taken at at the Colonial Life Arena at South Carolina University and published by Daily Mail, caused a viral stir and even reached the singer herself.

So, she took a selfie.

"Well, I took a 'self-knee' in the gym today. Never saw it before ... guess I do have a baby in my knee. #nofilter #funkyknee #weird," she writes on Instagram next to a photo of her knee.

The muscle above her knee cap resembles George's hair, while the fold in her skin is his mouth. From there, you can find his eyes and nose and have a laugh — it's uncanny!

Underwood recently treated her own son, 1-year-old Isaiah, to a day at Sesame Place while in Pennsylvania for her gig in Hershey, Pa. During the visit, Isaiah got to meet all of the Sesame Street characters, including Elmo, Cookie Monster and Big Bird. Of course, the proud mom shared pictures with fans on social media.

The superstar choked up before performing “What I Never Knew I Always Wanted,” which she wrote about Isaiah and her husband, Mike Fisher, at a show in Nashville this year.

"I’ve learned a lot about another group of amazing women in the last 18 months," Underwood says. "That group is mothers." She then thanked those who serve as a support system for a busy working mom, and told the audience how much she enjoys seeing families come to her shows together.

Underwood's Storyteller Tour continues through November, at which time she'll head to Australia for shows with Keith Urban.

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