 Also as with "The Christmas Invasion" (which contained the tune "Song for Ten"), composer Murray Gold wrote an original song for this special, called "".The song was performed by Neil Hannon, frontman of the Divine Comedy (who had, coincidentally, appeared in a sketch of "The Catherine Tate Show" earlier in the year).The song was previewed at the "" concert on 19 November 2006 at the Wales Millennium Centre in Cardiff, where it was sung by Gary Williams; the studio version featuring Hannon is on the released on 11 December 2006.