Soon it will be time for adland's annual party by the sea -- the Cannes Lions International Festival of Creativity is set to kick off Sunday. In preperation, Creativity and Advertising Age are taking a look back at the Grand Prix winners over the years. Here's a timeline of nearly two decades of the work that took home the top prize in film, typically one of the festival's most anticipated categories. What will win in the category this year? Share your thoughts in the comments section below.