Will and Kate Attend The 10th Annual Absolute Return for Kids (Ark) Gala Dinner

Even though Kate's dress for this particular event isn't as "traditional" and clean cut as she usually wears, it still fits her perfectly, which gives her that signature simple and elegant look she's become known for.

Pictures from: http://www.dailymail.co.uk/femail/article-2001737/Duchess-Cambridge-Kate-Middleton-Prince-William-Kensington-Palace-charity-gala.html