Pippa Middleton's brother-in-law may be royalty, but that didn't stop the 31-year-old from comparing her famous butt to Kim Kardashian's!

In a surprising article for the political weekly, 'The Spectator,' Pippa addressed the reality star's famous derriere, which she — along with the rest of the world — saw smeared in baby oil when it appeared on the cover of 'Paper' magazine last month.

"I must say that mine — though it has enjoyed fleeting fame — is not comparable," the brunette beauty wrote, referring to the insane amount of attention her behind got after she appeared in her sister's 2011 wedding to Prince William. By the way, we disagree.

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Getty Images/Paper magazine

Pippa (left) at the Royal Wedding in April 2011 and Kim on the cover of Paper magazine in November 2014

"But the Kim butt story did make me pause," Pippa continued. "What is it with this American booty culture? It seems to me to be a form of obsession."

You can thank Ms. Kardashian for perpetuating that obsession, Pippa. Feel free to watch the 'Keeping Up With the Kardashians' episode where Kim x-rays her butt if you need proof.

RELATED STORY: Eight Comments That Prove Kim Kardashian is Obsessed With Her Body

We admit we were tickled to see that Pippa, who is still one classy individual, also managed to get in a slight dig, writing, "Kim’s aim, apparently, was to break the Internet, but I’m not sure she’s going the right way about it."

This is how you get the world's attention, Kim. And look, she even managed to keep her clothes on!

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Read Pippa's full article over on The Spectator.