She's quite the hottie, as you can see in some of the photos like that cover shot and some of the ones below. She did some cheesecake shots in bikinis that were quite revealing of her ample bust. And by the looks of it I would guess she has had substantial breast augmentation, although there have been no rumors or other corroberation of that theory.
The movie directors take advantage of her curves in her movies roles, placing her in compromising situations where she has to do action scene while not properly attired.
And all the photographers love her too, shooting her with her shirt open and her bra-filling figure prominently on display, at least when she isn't running around in a bikini that is falling off.