I heard it on the radio and I think its by Evanescence... Ive searched and searched on youtube and its FREAKING annoying I cant find it. Its most notable feature is a repeating violin chorus...that's really quite fast. Its got a guy and a girl singing in the same way Evanescence does.
Could try Pandora Internet Radio. All you do is type in the name of a band or music genre and it plays music from that genre. If you type in a band, it plays their music plus music from other bands that sound similar. I've found some pretty killer songs using Pandora. It's free to use; all you have to do is sign up for it. Free accounts only get about 40-50 hours worth of music a month though, so be sure to pause when you leave the room.