Brit Has Left the Courtroom -- For a Moment

TMZ just watched as Britney Spears, with her hair down, walked out of her custody hearing, escorted by a handful of Sheriff's deputies and her lawyer. As she walked out, she looked agitated and upset.

Then, two minutes later, she walked back into the courtroom, with her hair now on top of her head. Hair and makeup!

One note, her lips are ENORMOUS. You cannot make out the shape of her upper lip.