VIDEO: Kim and Kourtney Break Out Into Feud Over Stealing Looks in New 'KUWTK' Clip

Dang, girls! Kim and Kourtney Kardashian break out into a heated fight on the latest teaser for the upcoming episode of Keeping Up With the Kardashians. It all goes down when Kourtney is trying on dresses for her birthday party with Khloé there to help her decide. KoKo suggests they FaceTime Kim to get her opinion, and that's when the feuding begins.

Before the call goes through, Kourtney whispers about Kim, "I don't know if I trust her opinion the most." And when she answers, Khloé says about Kourtney, "She wants me to call Kendall because she doesn't care about you and I." Ouch!

When Kim hears this she gets snappy, responding, "Well if you doesn't care about 'you and I,' then why do you keep picking out all the same clothes?" An awkward silence follows.

Kourtney then denies Kim's claims by saying, "I don't know what you're talking about. I've never dressed like you."

In the confessional portion, Kim complains, "I don't think Kourtney really understands the legwork that goes behind this. I don't think anybody understands. You have to really have a relationship with that designer."

Later in the clip, Kourtney reiterates the point that she and Kim dress differently, stating, "We have completely different looks. I’m not trying to copy your styles. But on a same designer, you can’t ban me from [them]."

It seems Season 17 will be similar to last season in that Kourt and Kim won't be seeing eye to eye.