Ha! Aw, but they're kind of cute. The not lead singers at least.

I frequently do similar when I hear songs that sound like other songs. I just sing right on top of it with I'm recognizing.

This band had betta WORK, I have a personal rule about bands that reference themselves in their own work. That rule being unless your a rap artist you need to back up that self reference with some serious skills or over the top antics. No run of the mill-ness.