Re: The four chord hit songs...
I listen to alot of Conteporary Christian artists: Hillsongs, Planetshakers, Michael W Smith, and I gotta say....they all sound the same from time to time. We played 3 songs at church the other day, all in G and they all went G, Em, C, D through the chorus. lol. Its fun, i guess.
Granted alot of Planetshakers are Hook and Riff based. Really cool tasty riffage in some of their stuff, very Brit Rock influenced.