If you sell yourself as a "singer", and not as a "one man band" or "one person orchestra"...then it doesn't matter what you use as as a backing track, or if you play at all...the sole purpose for you being there is to sing (and entertain).

I know I would not pay for, or be interested in, seeing a singer perform over a pre-recorded backing track...no matter who they were.

It's professional karaoke, plain and simple.

I would not attend a concert where the singer showed up with canned backing and no visible back up musicians.

Waste of time and money.

You guys are watching too many of these talent shows on TV...

Ian