Castle watches her micromanage her hair like he watches her manage everything else: with a wonder that anything gets done at all. Beckett's all business, but she still manages to make business look good, even in sweats.

He starts in low and soft:

"I can't look without being watched, you know
You rang my buy before I made up my mind
Oh now attitude, why even bother
I can't change your mind, you can't change my color...