In trying to Google whether Bonnie has a foot issue that results in her wearing flats everywhere, I learned that there is actually a WikiFeet Web site for photos of celebrity feet. I... cannot. And I don't have a PROBLEM with her choosing flats; I just don't always like the flats she chooses and/or think she chooses them at the right time. For instance, those purple suckers are dated and clunky for a) Cannes, b) summer, and c) life.
The dress reminds me of a pretty skirt pulled on over a retro bathing suit. With different styling it might've had a chance, but a slim one.