I don't sing in public because I think my voice is useless and not good enough
for my own listening standards, so use the excuse that I can't confidently remember words
[which is true] or melodies.
However with or without aid of a microphone, my doting elderly mother would, and who knows who else might,
praise me for having a marvelous voice for 'folk' music ???

Point is I take it as 'given' that no-one on stage performing for this xmas special
would have been selected if they didn't already meet certain widely agreed criteria of artistic worthiness & value.

My personal complaint with the entire production package is it's cringeworthy
showing off of elitist upper middle class bohemian vanity & conceit.

But then I can't tolerate or like jools holland & his on screen TV chums much for similar reasons..