The `Tron: Legacy` actress - who has previously married to Tao Ruspoli and was recently linked to `Hangover` actor Bradley Cooper - believes she could never have been with all of the men it has been claimed she is with as her anatomy could not cope.
She said: "In order to be dating all the people they think I am, I`d need four vaginas! It`s impossible!"
Now the 27-year-old beauty is more confident in herself, and now believes all new actresses should try and be "themselves".
She told Allure magazine: "I went through this kind of `Star is Born` transformation, where they made my hair very blonde, and I got very skinny, and I was like, `And now, I fit the mold!`
"If I could tell young actresses anything, it would be to just be yourself through and through, I mean, really be hardcore about sticking to your identity, because what makes you unusual is what`s going to assure your success."