Then on Saturday the party moved back to the Big Apple, where Kim toasted her birthday with Ciara, Adrien Grenier and more at Tao NYC's 10-year anniversary bash.
So what does she think of her new city and the men there?
"I love New York," she told me Friday night. "It's so fashion-forward. And I love living with Mason. I get to wake up to him every day."
And her adorable nephew is the only boy she's waking up to right now.
"Unfortunately, it really is kind of tough dating when you live your life on a reality show, so you gotta be careful," she explained. "Do the guys really want to meet you to be on the show—or the ones that you really like don't wanna be on the show. So right now my love life is kind of nonexistent. But I'm 30 and it's my birthday and I'm not going to think about that!"
And if you thought the birthday celebrations were over after back-to-back blowout parties in two different cities, think again.
Although Scott Disickwas MIA from both bashes, Kourtney said he's organizing yet another soiree for Kim on her actual birthday.
"He's planning Kim's New York birthday bash," Kim's sister told me. "Kim doesn't just have one party."