Don't be stupd, none of them wear wigs. You would have been able to tell by now, and I know for a fact anyway.
I would wear a wig if I was bald and couldn't do anything to grow my hair.
I read on one of her websites that for the film Atonement, she agreed to have her hair dyed red(ginger)
maybe/maybe not:p
Tell her its apart of a game you want to play with her or role-playing.