"We're not the stars, it's the cars, motorbikes and tractors," enthuses the owner of a 1976 Alfa Romeo Giulia at the foot of Montmartre Hill in Paris. Like him, almost a thousand collectors are criss-crossing the capital at the wheel of cars, motorbikes, bicycles and even tractors, for the 25th Traversée de Paris in vintage vehicles. IMAGES AND SOUNDBITES