Last year, Karl Lagerfeld designed a Buche de Noel for Lenotre. The cake was created by Lenotre Pastry Chef Guy Krenzer.

I found a description-- chocolate, cinnamon, almonds, hazelnuts & orange with a jeweled ax made of sugar.
But I'm getting distracted. This year, Lenotre's Buche de Noel will be designed by Hubert de Givenchy and it will be unveiled in September.

Buche de Givenchy.