Poking fun at Kim Kardashian's past insult of her, Kourtney's party featured these comical favors.
Who can forget what Kourtney told sister Kim Kardashian after she cried about losing her diamond earring in the ocean? The star had a little fun with her famous quote and put it on some of the napkins.
Kourt's ex-boyfriend was a guest, as evidenced by a photo he posted of a napkin at the soirée.
Another famous ex, Scott Disick, was also in attendance along with his girlfriend Sofia Richie.
The birthday gal posed with a group of her male guests, including Robin Thicke, French Montana, Kanye West and recently rumored beau Luka Sabbat.
The socialite and longtime Kardashian friend was one of the many celebrity guests at the big bash.
The five-time Grammy nominee sang "Happy Birthday" for the guest of honor along with Sia.
If you don't recognize her without her signature wig, songstress Sia harmonized with Thicke for a "Happy Birthday" duet.
The birthday star was clearly happy as she smiled from ear to ear in a black vintage Versace design.
The mom of three rang in her birthday with a very sexy sweet treat: a cake with a model of herself in the bathtub.
Kim Kardashian posed with the matriarchs of the Kardashian family, mom Kris Jenner and grandmother Mary Jo Campbell.
The youngest of the sisters sparkled in a rhinestone bandeau and matching skirt.
The reality star dressed up in a vintage Versace little black dress circa 1997 for her sister's birthday.