A talk show on BBC (IIRC "Parkinson") had three singers on as guests - Rock (can't remember who); Pop (Cliff Richard); Opera (Placido Domingo).

As part of the "entertainment" each attempted to sing the others "music". Domingo wiped the floor with them and did so with ease showing himself to be quite comfortable and competent in the other genres.

Well said Don Firth, although I have yet to hear Bob Dylan actually sing anything.

I also particulalry liked this from Foolestroupe:

".....and you don't hear whiny, nasally, breathy sounds either, with no breath control, and the inability to be heard with out a mic."

"A breathy weak voice can be very alluring live in a small room, but I think the recording industry is using such a sound merely to sell 'sex'...

Describes Kate Rusby to a Tee (I cannot even listen to her gasp her way through one verse let alone a complete song).