There are usually just two ways in which you can score a hit these days. One is to have a subliminally catchy song that gets at the listeners gradually, seeping it's way into their minds and gradually becoming more and more irresistible to listen to; it's commonly these kinds of songs that will remain fresh and catchy every time you hear it, a good example of a recent song that does this is Adele's new single, 'Rolling In The Deep'. The o...