...and why she won't do it on film. She discusses picking a body-double for an upcoming film, changing her hair color, and future plans. Now, I know what you're thinking. Why is David writing about Mandy Moore and hair color? First, Hillary Duff's boobs have generated TONS of search queries for the site. Second, Mandy Moore is a little cute, you've got to admit (I really do prefer the brunette hair).