That is how young women tend to dress...
And so they should if they so choose to but you can't have the fanbois claiming she doesn't use "sex" to drive sales when she quite clearly does as all women in the music industry seem to do (bar Susan Boyle of course - the exception to prove the rule!) and men do to. I don't see anything wrong with it but let's not pretend she doesn't because she does and I am not complaining.