Pop music is a term that describes compositions created for the purpose to gain mainstream success. It is belived that pop music as a phenomenon and part of mass culture evolved in the 1950s. The term "pop", abbreviation of "popular", appeared at the same time.
Pop music can be based on any kind of music, adopted to appeal to the majority of listeners. Lyrics can concentrate on any theme, but texts about happy or unrequited love are most common. Pop songs are easy to perceive and remember, they have mainstream style.
9 2006
With the doubtless evolution of his talent Damien Rice has now turned to a darker sounding of his music, that's why 9 is significantly different from the previous work surprising with a deeper philosophic lyrics