Logorama by H5
This animated short film is told entirely through the use of 2,500 contemporary and historical logos and mascots.
It was directed by the French animation collective H5, François Alaux, Hervé de Crécy + Ludovic Houplain. The film won the Prix Kodak at the 2009 Cannes Film Festival and the Academy Award for Best Animated Short Film 2010.
More info in the Wikipedia.