The numero uno Hollywood stylist barely gained any weight while pregnant with baby Skyler and considers herself to be an "expert" on the subject.
Clearly Posh is intrigued because Rachel's been visiting the mum to be at her Beverly Hills home to give her tips on staying slim.
A friend says: "Victoria has been eagerly listening to her advice and they have become firm friends."
Nothing's wrong with a little weight gain, ladies. They don't call it "eating for two" for nothing.
[Image via FayesVision/WENN.]