A smile and a reassuring sprinkle of panache....

To be fair, with traditional songs it?s not always noticed as ad Lib because even if it?s not what you intended to sing, anyone actually concentrating may assume a variation in the song.

Which it is.

And if the performance ends up on YouTube, it may get repeated.

As I was delighted to hear when someone at a local club sang my ?version? of a verse to a song last year.

(It wasn?t forgetfulness in that case, more of a mixed audience and realising a line was coming up where coal was referred to as a black devil. I changed it on the hoof to old devil.)