WATCH: Inside Kris Humphries' Bachelor Party

Kim Kardashian's fiancé Kris Humphries partied with friends the night away at his bachelor party over the weekend in Las Vegas.

Watch the video to see Kris letting loose with Khloe Kardashian's husband Lamar Odom and Kim's brother Rob at the party, which took place at Lavo nightclub inside the Palazzo.

Kris' wife-to-be was also in Las Vegas over the weekend for her own bachelorette party, which took place at the nightclub Tao. But Kim apparently couldn't bare to leave Kris alone during his bachelor party because she briefly crashed the bash and shared a kiss with Kris before continuing with her own girls' night out!