A few of my thoughts on Pop music-

1. Pop music is time specific to the date in which a piece is written. It is geared to please the masses using compositional methods commonly used in the now to please the largest possible audience of the now.

2. A non-pop song can turn into a genre if others follow the styling, thus leading to sound-alike songs that can become pop as the genre progresses (or in most cases digresses). I think it would be a mistake to call the creators of a genre, pop. (Thus early punk will never be pop, but modern punk could creep its way to pop status if it isn't there already)

3. The Beatles were very pop in their early days because they borrowed compositional methods from popular culture, but I would have to say that alot of songs on Revolver through the White Album were not pop because of the experimentation involved.

4. Most of Pink Floyd was not pop because of the experimentation involved even though experimentation was popular, as was Pink Floyd.

5. Pop should not be mistaken for commercial. (Commercial being music created by a producer)

Shit... need to get back to work...