Lol Christian Rock songs as in, worship songs?
If you're thinking of anything good, I like Sonicflood. They're good, deep meaningful lyrics with music to match it. Not all their songs are really worship songs, but it really comes from the heart, ideas and music flowing very freely.
Then comes the usual staples of Hillsongs and Planetshakers, which personally I find that they were tailored specifically for worship. Its in the sense that the music doesn't really flow very freely, following a certain formula to achieve its purpose.
Well, my opinions, at least
If you're looking for bands that have songs meant for the secular world but have traces of their faith written in, bands like Anberlin (some of the Cities and New Surrender material though), Fireflight, Flyleaf, Underoath, etc would be good