Amber Rose And Blac Chyna Making Waves

9/14/2015 6:47 AM PDT

Amber Rose And Blac Chyna -- Making Waves (PHOTO)

The list of things Amber Rose and Blac Chyna have in common keeps getting longer.

We're guessing their baby daddys were on baby duty, so the BFFs stepped out in West Hollywood Sunday at Penthouse Day Club. Rose was barely recognizable.

They say best friends are like sisters ... Kardashians beware.