You can bet that when Kourtney Kardashian is around, Kim Kardashian is right there beside her ready to comment on the reality star’s looks. Typical siblings.

After the whole Kourtney-is-the-least-interesting-to-look-at debacle, Kim’s now taken it to the next level by telling the Keeping Up With The Kardashians star that she looks like a “f**king grandma.”

"I don't even know what this style is. I feel like we're stuck," Kim told Kourtney and her glam team about her look in this week’s episode of their E! show.

"I just want you to be more like I said, 'Cool girl.' It's like trying too hard. And then like, 'Oh we're in Japan, it's crazy colours. Oh everything is Asian Japan because I'm in Asia,'" she went on to say.

"I have no more Asian Japan vibes," Kourtney responded.

Apparently Kourt’s own choices when it comes to her outfits just don’t do it for Kim, as she wanted her sister to go for a more model-esque look. But hey, we’re not all Kendall, you know?

"You look like f--king grandma. 100 percent," Kim said. "You don't look anything special. Like you don't look anything innovative. And I think you have it in you, it's just you better evolve before you fizzle out."

Just imagine. Obviously Kourt wasn’t happy, telling the camera: "Now I think Kim's just being rude and rude to everyone in glam."You don’t say.

"You know, we're all doing fun looks together. It's not that serious. And I think Kim and I don't always see eye to eye as far as the importance of like, traveling and living in the moment."

Preach it Kourt. Although we do love these sibling squabbles. If you can call it that.