But I've only played bass onstage a few times - guesting with friend's bands and stuff and if they do Wrathchild or something else by Iron Maiden, I'll play bass because its so much fun.. But, the only backup vox to that is yelling "wrathchild!" so even I can't screw that up - no matter how much I try..
The weirdest song for me to sing backup on was "Too Young to Fall in Love" by Motley Crue.. singing that chorus, while playing that main riff, was a challenge, but I eventually got it down - ping ponging between concentrating on vox and what I was playing on guitar.. tricky, tho..
Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..