"Look who it is -- Mrs. West in the building!" Khloe Kardashian Snapchatted a video with sis Kim at the family's annual Christmas party last night and we're gonna break down this 5-second clip and analyze each and every frame of it!

#1 - Khloe makes a point to call Kim "Mrs. West" -- why? She wants fans to know she's still with Kanye. Despite all the trouble between the couple -- her robbery that's caused stress, Kanye's breakdown and hospitalization -- they're still together and they want everyone to know that.

#2 - Kim has a lip ring! We're 100% sure that's not a piercing -- Kim would never do that -- it's a temporary accessory and she makes a point of showing it off with a profile of her famous pucker and a cheek kiss for Khloe.

#3 - There's no #3 -- aren't the first two big enough?!

So what else happened at the Kardashian Kristmas party? Caitlyn was there in a beautiful red holiday cocktail dress, Kylie was on fleek with some new bling from boyfriend Tyga (more on that later), Kris was injecting herself into every Snapchat she possibly could, and Kourtney was there with the kids after enjoying some Calabasas "snow" earlier in the day.