Don't know if you've seen it yet, or if it's been posted yet, since YouTube won't work on the computer I'm on, but there was a Lelouch/Zero cosplayer at MangaNEXT that sang Viva la Vida. Ridiculously awesome :) There are videos of him online~

His opening narration was something like "I'd like to tell you a story, a story about my life." asjkdfhkajdhf ;___;