No....this is MY gig, get your own...

Seriously, in 15+ years I've allowed two people to sing with me. In both cases, they did a fine job, but after one tune...away they went.

Typically, its us making them sound rather good-which we should do-But you can push your luck just so far and then the professionalism of the whole things crashes down.

I'm biased of course, I no longer even let my former sidemen on the same stage because they wouldn't rehearse. So maybe I'm the wrong one to ask, lol...