What's wrong with Charlene's sense of style? She doesn't seem to have one at all. Her outfits are either boring or very unattractive. She seldom gets it right (or at least close to right).
I have no idea who advised her to wear what she wore, but she should definitely never listen to that person again.
The biker chick jacket / ball gown / Roman gladiator combination was the worse I've seen on her so far.
For someone who is claimed to be a minimalist and not fond of jewelry she put on quite a bit of it (even if it's fake and part of the dress). Also, I am still waiting on the glamour she said she was bring back to Monaco. If that's her attempt, I would suggest she stops...
A horrible look. It could have been quite a nice dress, but she managed to destroy it with all the wrong additions.
Hair and make-up completely to not match the dress, maybe the make-up matches the biker jacket, but the hair is off either way.