The 27-year-old reality star made sure she was on hand to give her sibling a party she would never forget in Las Vegas last month, proven by her own photographs of the event, which she posted on her website today.
The shots show Khloe dressed up as a sexy firewoman, in lieu of a stripper and surprised Kim in her hotel room.
Surprise: Khloe dressed up as a sexy firewoman in lieu of a stripper and surprised big sister Kim in her hotel room as part of her bachelorette celebrations in Las Vegas last month
'It was a BLAST!!!!!' Khloe wrote of the revelries. '[Kim] actually wanted a private, very low-key party but I said HELL NO!!!! LOL.
Fooling around: Dressed in a fireman's hat, along with a short leather skirt and thigh high boots, Khloe poses with a plastic pig and pretends to drink from her fire extinguisher
Sister act: Khloe poses alongside sisters Kim and Khloe at the bash, with Kim dressed in a tiara and sash and holding a heard shaped paddle
But judging from the photographs, which show Kim having a champagne dinner with her girlfriends in Tao's private dining room, she had fun at the event.
'Even if Kimmie did get a little mad at me, I know she still had the best time,' wrote Khloe of the festivities which included her downing shots with her sisters and drinking through straws shaped like a male appendage.
Dinner time: Kim (centre right) was treated to a meal, complete with pink champagne with several of her girl friends before they hit the club
Naughty: The photographs show Khloe and her friend Malika Haqq indulging in a bit of girly fun over dinner
And while the ladies were celebrating with Midori cocktails, Kim's basketball player fiancé Kris Humphries was holding his bachelor party at nearby nightspot Lavo.
At one point, Kim even broke with tradition to see her fiancé and sneaked a kiss with him at the club where he partied with Khloe's husband Lamar Odom and Kourtney's partner Scott Disick.
Taking the cake: Kim was joined by scantily clad dancers and a bachelorette cake at Tao nightclub in Vegas
Soon to be wed: Kim and fiance Kris Humphries plan to tie the knot later this month
Other VIPs at the party included her friends LaLa Vasquez Anthony, Brittny Gastineau and future sister-in-law Kaela Humphries, who joined 20 or so other party guests.
In the club, star struck fans clamoured to get close to the group, snapping photos with their mobile phones.
Kim then got on the mic, telling the crowd: 'This is one of my last few weekends as a single girl!'
New Jersey Nets player Kris surprised Kim by proposing to her back in May, spelling out 'Will you marry me?' in rose petals on the floor of her bedroom at her Beverly Hills home.
The sparkling ring was 20.5 carats and cost in the region of $2m.
They are set to tie the knot on August 20 and have been busy with their wedding preparations in recent weeks.
Their wedding invitations have been sent out and they were spotted cake testing last week.
Kim and Kris are likely to have the wedding filmed to broadcast on U.S. channel E! which airs Keeping Up With The Kardashians and the spin-offs from the hit reality show.