Christian Louboutin seems to be in quite the collaborative mood at the moment with fellow country men, first with world famous French bakery Laudree and now with champagne makers, Piper Heidsieck. Louboutin designed the ultimate glass slipper to be included in a limited edition Heidsieck x Christian Louboutin Le Rituel Box Set, available through Parisian boutique, Colette from October 26, 2009. [ChicReport]