I get the sense that Corsica is more old-fashioned in that respect than Paris. I'm judging this not only by Alizée but also by my Paris correspondent who was also born in Ajaccio.
It's not just the sexual explicitness, though. Mylène Farmer is sexually explicit but not "trashy" in that all of her songs in which she does sing of sexual themes are either romantic or sexually exciting (and often rather kinky). Madonna likewise. Also the late great Freddy Mercury of Queen. With Lilly Allen, I find myself going, "Wow, that's kind of gross."
And I get the feeling that's the intent. She kind of reminds me of Julie Brown.