What do rich people do when they wanna have a party? They pitch a tent in their back yard and install trees and chandeliers and over-the-top decorations when mere feet away, they have a $30 million mansion that already has all that stuff inside and instead they envelop themselves and their guests in plastic!

That's what Kim Kardashian did for her man last night at the rapper's 41st birthday celebration on the grounds of their Calabasas home. Hey, if they didn't indulge in this ridiculousness, party planners would be out of business!

Kim paid big bucks to have a baker design a cake in the likeness of the Grand Tetons in Jackson Hole, which served as the backdrop for Ye's recent listening party on the occasion of the release of his new album Kids See Ghosts and design cookies with West's face in frosting. She also had baristas make lattes with her hubby's face on them -- and his Yeezus logo.

Beyond that, there was a dinner, lots of selfies and Snapchats and some music. Ye hung out with Pusha T -- amid the Drake drama following the release of Pusha's Kanye-produced track "Daytona" that seems to diss the Canadian singer -- and Kid Cudi, who's Kanye's partner on KSG. Kim invited "mentalist" Lior Suchard, a self-described "mystifier" who performs "supernatural entertainment" (fun!).

Kim's sisters Kourtney and Kendall showed up for the event and we're sure Kris was there -- she never misses a party -- but Khloe was still in Cleveland, likely wiping away tears as she clings to a relationship with her baby daddy that'll clearly never work out. She'll be pissed one day when she looks back, that she missed having fun with her family in exchange for getting sh*t on by Tristan Thompson!