The Twelve Keys Of Christmas was written as a fun and challenging version of the ever-popular, interminable carol, but with a key change every verse! Almost every major key is used, except for one in the parallel minor, and although it starts simply, the piece quickly becomes sillier and sillier. The first three verses are written in the style of every theme-and-variations ever, before more and more quotes and mashups start to appear.

As well as many timeless Christmas songs, the arranger ha...