I personally don't think it's a appropriate dress for a court appearance. The lack of a bra makes it even less so, IMO . 
That's funny because I thought, "Hey, at least she's wearing a bra!"
I believe that she is. I've seen some closer up pics and it looks like she's wearing a white bra.
I agree. I think she looks very cute, but yeah, it's probably a little short for court. But at least everything is covered.
It's not obscene. Too tight and clingy to be totally flattering, but that's her problem, not mine.
But, if clothes are statements (and certainly movie people should know that), it doesn't say, "I am take my situation seriously and am prepared to work to rehabilate myself, physically, mentally, and professionally, if the court is kind enough to give me that option." Instead, it says, "Can we move this hearing along, because there's a club seat waiting for my rear on it."
Which is probably not the best message to send, all things considered here. I'm surprised her lawyers can't persuade her to wear something that says, "I'm clean, I'm sober and I'm serious".