A slight derail but hopefully relevant. A couple of years ago I did a wedding gig in Derbyshire with a pop / soul band that are OK ( they're somewhat stuck in 2nd gear for my taste) who have got a great female singer.
Midway through set 2 we got asked, " can you do Valerie again, my friend does a great version of it "....we obliged, our singer shuffled to the side of the 'stage' and we launched into it for the 2nd time that gig.
The friend, who wasn't unattractive at all and must have towered nearly a foot over me ( I'm 5 ft 7) in heels really belted it out. Very strange experience: I remember glancing over in a bit of fellow artist bonhomie / esprit de corps but we band underlings were as invisible as glass collectors I suppose.
She left the stage to polite applause, I think the experience was deflating to her somehow.
Her voice was loud, in tune and she was confident but completely lacked all the things that make a singer a singer. She must have been half as loud again as the usual singer but there was nothing appealing at all about her admittedly ad hoc performance.
I suppose that is the karaoke tradition for you. It made me realise that I have been fortunate enough to play with decent singers that hold an audience for quite a while.
She continued to completely blank us as we set the gear down. Fair enough, we weren't exactly the Brothers Johnson.