That's right, Rob Kardashian's ex-fiancée Blac Chyna was in the building, rocking a beautiful sheer blue gown with a plunging neckline.
Then Kylie Jenner's ex-boyfriend Tyga also made an appearance dressed in a dapper all-black ensemble. He also happens to be the father of Blac Chyna's 4-year-old son King Cairo Stevenson.
And to top it off, Khloé Kardashian's ex-husband Lamar Odom stopped to enjoy the party.
Akward AF, right?
Well, for anyone else this reunion of the exes might have been a problem...
...but for these three, not so much. In fact, Blac Chyna and Lamar were taking pictures together all night.