AceShowbiz -

Kim Kardashian has responded to Pippa Middleton's comment on her famous derriere. On the red carpet of Rihanna's First Annual Diamond Ball on Thursday night, Kim told E! Online of Pippa, "I love her. She has an amazing booty. She's beautiful."

Pippa previously wrote an article for The Spectator's Christmas Special, comparing her bottom to the "Keeping Up with the Kardashians" star's booty. "No year is complete without a bottom story, and the 'Rear of 2014' award undoubtedly goes to Kim Kardashian, after her posterior exploded all over the internet last month."

Kate Middleton's sister added, "I must say that mine - though it has enjoyed fleeting fame - is not comparable. But the Kim butt story did make me pause. What is it with this American booty culture? It seems to me to be a form of obsession. Kim's aim, apparently, was to break the internet, but I'm not sure she's going the right way about it."

Kim previously made headlines with her naked booty cover for Paper magazine. After receiving some backlashes, she defended her controversial photos in the name of art. "I was so honored and excited to work with [photographer Jean-Paul Goude] because he is a legend, and for me that was something I wanted to do to make myself feel confident," she said during an appearance on Australian TV show "The Project".

"As a role model I'm not saying anyone else should do that, but for me it was an art project and it taught me to do what you want to do," Kanye West's wife added, "I'm never one to preach, but I felt really positive and really good about myself. I love the photos, I did it for me, I hope other people like them."