Well, Giok, the vodka bottle is nearly empty, but other than that I have all night and in the morning I shall be sober.

You should know better than to misrepresent "finger in the ear". In most cases it was no such thing but rather the cupping of the ear the better to hear oneself (the better to stay in tune) - something I have known many rock singers do too.

It is also possible rather than cupping the ear, to stop the ear or to put the finger on the bone just ahead of the ear - so that the vibrations of the singing are again better heard to exactly the same purpose.