Kylie opted for a sillier snap, licking the top of Khloe's left breast.
A source close to production told ET on Friday that the 10th anniversary special of KUWTK will feature interviews with all the family members. Additionally, "viewers will see a lot of never-before-seen footage from every season."
"The 10-year anniversary Kardashian show was done in front of a studio audience at a studio in Van Nuys, California," added an eyewitness. "There was a Q&A portion with the audience. All of the audience members got gift bags from the DASH store. Ryan Seacrest also attended."
According to TMZ, Megyn Kelly was also on set, as she's debuting her new show with a sit-down interview with the entire Kardashian family, minus Rob Karadashian and Caitlyn Jenner.
Earlier this week, Kim and Kourtney Kardashian were spotted soaking up the sun in matching sparkly bikinis. The two were vacationing in Mexico with their gal pals in celebration of Kourtney's birthday (she turned 38 last Tuesday).
See highlights from their getaway in the video below!