Mark Dowding:

I would NEVER use a book or printed words when singing in public! Well, almost never; I suppose I have at some time in the past, but I can't remember when it might have been.

I won't say that I've never come up dry in full flight on a song, but it's as likely to be a song I've been singing for fifty years (and maybe sang last night) as it is a "new" song that I've not learned the words to.

Dave Oesterreich