Say what?! When did Jennifer Aniston and Selena Gomez become BFFs? 

So last night, Jennifer Aniston attended a party at the Chateau Marmont celebrating her film

The fete, hosted by Perrier-Jouët, brought out Mel Gibson and Zach Braff.

But it also drew Selena Gomez and by the looks of these photos, Taylor Swift has competition in the BFF department.

“I have not only been following her career as a fan since I was 8 and now get to watch her completely transform in her new movie CAKE, I have gotten to have real conversations with such a real heart, made my entire year. #cake #goseeit,” wrote Gomez on Instagram.

Selena Gomez and Jennifer AnistonPhoto by Ari Perilstein/Getty Images for Cinelou

New fashion rule: You MUST wear white after Labor Day

Selena Gomez blames fender bender on paparazzi

Beckham, Eastwood, Cobain: 5 celebrity kids you must follow on Twitter

Santa’s got nothing on Busy Philipps’ busy little elves.

Viral voguing sensation Brendan Jordan is now an American Apparel model

10 times Christopher Walken was the absolute best part of \'Peter Pan Live\'

So, about that new ring Jennifer Aniston is wearing...

Jimmy Kimmel challenges Ryan Seacrest to sit still for a whole minute

Say what?! When did Jennifer Aniston and Selena Gomez become BFFs?

Azealia vs. Azalea: Banks rips Iggy for remaining silent on Ferguson, NYPD

Carrie Underwood, Mia Farrow and more great Twitter notes on #PeterPanLive

Anna Kendrick found \'Peter Pan Live!\' to be hilariously \'sexually confusing\'

Bang bang! Ariana Grande gets smacked by Victoria\'s Secret angel wing