It's lucky for Brandy that she was in a massive car like tha
that. Had she been in a little sports car like most celebrities choose to go around in, she could well have been dead
If that does happen and she gets a sentence, that would be terrible - imagine not only having to face the guilt of knowing you've killed someone by accident, but to be then sent to prison for it, too.
As you said though, I find it highly doubtful that she will be put in prison because she wasn't under the influence of anything (drugs/alcohol).
Accidents happen unfortunately. We should all learn from this and be extra careful while driving - I know I will be! I've very nearly been in a similar situation a few times!