The ladies were among guests at the glitzy black tie event in Los Angeles last night (11 December), which raised money for Rihanna's own Clara Lionel Foundation.
We wonder if their paths crossed?
Kim and Adrienne were close friends while Adrienne was dating Kim's brother Rob several years ago. Adrienne even appeared on the family's Keeping Up With The Kardashians reality show.
But things appeared to turn frosty earlier this year, when Adrienne suggested in an interview that being associated with the Kardashian name had hurt her career.
Kim and sister Khloe immediately leapt in to action, with Kim tweeting: "Funny how she says being with a Kardashian hurt her career yet the only reason she has this article is bc she is talking about a Kardashian. So sad when people try to kick my brother when he is down #FamilyForever."
Adrienne, however, took to Twitter to defend the interview, saying there was a difference between having fame and having a career, and that she never wanted to be labelled as someone's girlfriend.
Then, at the end of August, it seemed Kim was offering an olive branch, when she described Adrienne as a "sweet girl" during a TV appearance.
When asked whether she'd like Adrienne or Rita Ora, another of Rob's ex-girlfriends, as a sister-in-law, Kim replied: ""I would say Adrienne Bailon because she was in our lives for a long time and I know she's a really sweet girl and she has good intentions and a good heart,"
And then last month, Adrienne was caught on camera admring Kim's now-infamous naked photoshoot for Paper Magazine, saying Kim looked "beautiful".
So, it seems like everything is now rosy in the Adrienne/Kardashian world and if their paths did cross last night, it would have been amicably!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!