I have to do a paper for my American Pop Music class on a cover song. I know a few songs U2 covered from other bands, but I'm sure there are some I'm forgetting. This is where you come in....I'd like to know of some songs covered by U2, as well as U2 songs covered by other bands. I need to be able to download or buy the songs to put on a CD to hand in, but really any extra suggestions would help. Thanks!