So, what went down at Kim's Vegas birthday celebration this year?
Khloé Kardashian Odom, along with Lamar Odom, Kris Jenner, and Kim's former Dancing With the Stars partner Mark Ballas were all on hand for the Saturday night festivities, noshing on Italian food and toasting Midori Sour cocktails and champagne at Lavo with the birthday girl before the main event.
Once the gang was inside Marquee (after making their way past tons of screaming fans), E!'s own reality darling hopped on the mic as DJ Cedric Gervais spun hits, saying "Cedric, turn it up!"
Then, it was Khloé and Lamar's turn, as they grabbed the mic and sang "Happy Birthday" to Kim, causing partygoers to join in.
But, that wasn't the birthday girl's only sweet treat that evening.
Kim's VIP crew also enjoyed a birthday cake from Gimme Some Sugar, which had a depiction of Kim and Kris in a white Ferrari with a custom Kardashian logo on the car.
"Tonight was so much fun!!!," Kim tweeted after the party. "Yummy meal at Lavo then fun night at Marquee! Thanks to everyone who came out! Now jetting back to LA!"
Happy Birthday indeed!