Bill, continuing with your line of thought on the complexities of Merry Christmas (and being not in agreeance that "everythings been done before")...say you have just an octave worth of notes (12). Going with the math side of my brain here...and throwing some probability at you... So note 1 has 12 options, introduce the second note and you have 12x12=144. By the third note, you have 12x12x12=1728 options. See where I am going? By the time you are on your 10th note, that's over 10 billion options. How many notes in an average song? (even considering you probably repeat alot for verse, chorus). Now throw in the fact that each note can be of different duration (1/4note, 1/8 note, 1/2 note with rest,...). It hasnt all been done. Just alot of copycatting out there.