Karl Lagerfeld and Pharrell may seem like an unlikely design duo, but the pair has been secretly working on a sneaker which may be the world's most expensive (and exclusive) kicks. The sneakers are a collaboration between Chanel and Adidas and were debuted at Chanel's takeover of the Parisian Colette store. Only 500 pairs of sneakers were up for sale, although around 120,000 people pre-registered to purchase them - pushing the resale price up to around $40,000. Out of these 120,000 people, 499 lucky customers will receive a confirmation emailing signifying that they can purchase a pair. One pair has already been purchased by Justin Timberlake at the Colette event. This is a landmark occasion considering Chanel has never put their name onto a product produced by another brand previously in fashion history.