Got It!

OMG. I figured out the Identity guard song. Lauren is subscribed to the WGI videos online, so she can watch on demand any guards in their competitions. So I brought up their video and listened as closely as I could, and deciphered a few tiny snippets of lyrics, searched Google a few different ways, browsed through iTunes' various versions of the song and voilà!

"White Rabbit" by Collide. A way more awesome version than the original, which was evidently by Jefferson Airplane. Go! Download!

(I know. It doesn't sound that obscure and whispery. Their show is a lot of different music edited together and remixed, so it's more difficult to hear.)