Well, all bets are off—there's no predicting what may come out of these sassy sisters' mouths. But you can bet it's going to be naughty.
But surprisingly, as our exclusive footage shows, it wasn't just the sisters who got a little feisty at the shindig...the groom-to-be had plenty to say, too!
Now, it's a given that every man wants a little bit of freedom when he's out celebrating with the guys, particularly when that celebration is a bachelor party in Las Vegas. But it's also a given that not every man is engaged to Kim Kardashian.
"I told Kim, I said, 'Look, I'm turning my phone off, I'll see you back in L.A. Monday afternoon,' " Kris Humphries explained.
"She was like, 'No, you're not turning off your phone, I love you, you're not turning off your phone.' Like, it's our bachelor party, give me some freedom."
Well, you can't have a lover's quarrel without the love to back it up.
Oh, and as for that freedom? He can kiss that goodbye: Kim ultimately ended up crashing her man's soiree.
Hey, we all already know that what Kim wants, Kim gets. The sooner Kris learns that lesson, the better.
(Originally published July 29, 2011, at 3:20 p.m. PT)