Tye,
I think, if you're having the feelings that you describe, that it's worthwhile to keep in mind that these are song lyrics, and the singer is kind of like an actor, so it is very analogous to making the distinction between the character being portrayed in a movie and the actor portraying the character. Just as Alizee is not Lolita, she's not the lady in the bathtub either. Maybe that will be helpful? And, yup, she's had sex, and she has the end results to prove it
Killian,
I've made rather cynical statements on this before, but anyway, I think a lot of this has to do with media manipulation. Adriana Lima is a Victoria's Secret model; her job is to sell underwear, mainly by presenting a media construct of herself as a sex object. Alizée's media construct is very different, and, in my opinion, designed to inspire the sorts of feelings that you describe.
EDIT: I should say further that nothing I said is meant to disagree with either Tye or Killian.