There's a lot of rumours flying around that rebeckah has 2 chins.
Trust me. Her skin folds around her neck that way because she has a inhibited lower jaw bone.
Which techincally means, "she has no chin".
This of course, is counter intuitive, as it folds her neck skin twice, and makes it look like she in fact has 2, 3, 4 or even 5 chins. (Depending hos she smiles)
But, it is just an optical illusion given the fact she has a diminished lower jawline.
Case in point:
Rebeckah in 2 years.
Now I want to dispell *ALL* rumours.
THIS IN NO WAY MAKES HER 2 FACED.
(That's purely her personality)