Gavin,

Very clever--I get the dual vox is cool, but would be funnier if voices were different. I posted a song here a few years ago that was a duet and sang the girl's part--got teased a bit, but finally did replace the girl's part with a gal! That's a good question though to have them background or just up front guys like the Smother's Bro--You could have fun experimenting! However, very entertaining!

steady-eddie