All I have to say is "Good."
Susan Boyle deserves to pretty up a bit and she has sensibly (so far) simply freshened her hair and cleaned-up her eyebrows.
What's the big deal? Some people seem to feel absolutely betrayed by her "makeover" which is ridiculous. A little hair dye doesn't change who she is or worsen her voice.
In short, Susan Boyle is ultimately a woman who never had a chance opossibly a reason to spend time on herself. She can now and good for her.