How do these two know each other?!

Brittny Gastineau looked gorgeous as she headed to a SoulCycle class in West Hollywood yesterday, and the socialite was accompanied by none other than Justin Bieber's ex-fling Chantel Jeffries. The ladies decide to match outfits in their "I Sweat Diamonds" t-shirts, and after grabbing blended green drinks, we managed to catch up with them as they made their way to the car.

We asked Kim K's bestie about the rumors the reality star is pregnant, but like the good friend she is, she would only say, "She looks great". We should have asked Miss Jeffries if she's still romancing The Biebs!