Kim Kardashian Crashes Fiance's Vegas Bachelor Party!

Kim Kardashian, her mom, sisters, and a slew of gal pals tore up the town in Vegas last night to celebrate the reality star's upcoming marriage to Kris Humphries. They had a blast partying at Tao, but Kim couldn't resist the urge to check in on her man, who was having his own partay on the Strip.

Kim crashed Kris' party at about 2am, after a fun-filled night with her guests -- La La Vazquez, Brittny Gastineau, and her future sister-in-law, to name a few. The gals wore red illuminated rings on their hands for the party, while the bride-to-be sported a light-up tiara and carried around a wand. The festivities included a strip tease, drinks, dancing, and, of course, lots of photo ops, reports People.com. 

At one point, Kim told the crowd: "My sisters are doing everything they can to embarrass me!"

Following the shenanigans at Tao, Kim opted to mosey over to Lavo, where her man, bro Rob, and brother-in-law Lamar Odom, along with a bunch of other NBA stars, were getting their drink on. Apparently Kim and Kris had agreed not to see each other over their special weekends, but the starlet didn't think twice about interrupting Kris and friends in the VIP section! 

Kris was a bit shocked at first, we hear, but then did what any guy who's got a hot fiancee like Kim and picked her up and kissed her in full view of everyone at the club! Awww.

Kim and the gals reportedly stayed for just a few minutes before leaving the dudes to their drinks and the deejay. 

We'd also like to note: All this Vegas fun came after Ms. K's swanky LA wedding shower Saturday, where Demi Lovato and more celebs came to celebrate the star and her giant engagement ring!