Hot or Not? Amber Heard Wears a Simple, Sleek Navy Dress

Amber Heard attended the Paris premiere of her new film The Rum Diary (which, inexplicably, in France is called Rhum Express wearing this simple, sleek long-sleeved navy gown.

Amber Heard does look perfect pretty much all of the time, but is this dress too plain for a premiere? Or does simple + sleek Amber = spectacular?