A research team at Bristol Univeristy has engineered a complex learning algorithm that can predict the hit factor of a popsong with a 60% accuracy using the decades of the UK pop chart as a base. The reseach is available at http://scoreahit.com/
Interestingly, hits were most difficult to predict around 1980 +- half a decade. suggesting that this was a period of exceptional creativity in pop music history. Yeaahh! That's my fav period. That just has to say something about me, although I'm not sure what!