Just because her breasts don't come together when wearing a halter bikini top like that doesn't mean that they are fake. I have 36 D breasts (natural) and I have a bikini similar to Scarlett's and mine don't come together either, there is usually a gap no matter what kind of bra or bikini that I wear, unless I wear the padded kind that push them together.
OKaaaaaaaaaaaaaay well I guess they come in all shapes and sizes, sagginess, cleavage or not. But i still think Scarlett's look quite fake. She looks lovely anyway.