I love the name
Natasha, don't find it dated or too 80's sounding and certainly don't see it as a stripper/adult star type of name. I like it as a full name, not a nn for
Natalia or
Natalie. I see all three names as separate names in their own right. If you let people know that she's to be called
Natasha all the time, then people will get used to it. Don't know any
Natasha's, no.
Natasha is my favourite, then
Natalie, then
Natalia.