The internet will never fully accept Rob's girlfriend if she isn't Kristen Stewart.
Katharine McPhee just got added to the list.
Just how many women is this guy dating?!
She's a personal trainer, and looks like a mix of K-Stew and Pippa Middleton.
Whether they're man enough handle the foam finger-loving twerking queen is another story.
Skin like Cate's in 10 easy steps.