The Keeping Up With The Kardashians star was pictured heading for a workout in Los Angeles on Saturday shortly after giving her thoughts on Pippa's famous rear.
It all started when Pippa penned an article discussing Kim's naked bottom pictures for Paper Magazine, saying: "I must say that mine — though it has enjoyed fleeting fame — is not comparable."
Kim later returned the compliment, telling E! News: "I love her! She has an amazing booty. She's beautiful!"
It's no surprise Kim loves Pippa considering how much Kim admires Pippa's big sister Kate Middleton; she's often spoken before of her love for the Duchess of Cambridge.
Kim has said in the past: She is just a class act. She really knows how to put things together really appropriately. She has a really feminine style. She's just super chic and stylish."
Meanwhile, the Kardashian clan had reason to celebrate over the weekend as a new Kardashian entered the world!
Kim's elder sister Kourtney gave birth to a baby boy, her third child with long-time boyfriend Scott Disick.
So far, no details such as a name have been released.
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!