Rating: Verdict: Classics with a country twist Elvis Costello once said a great song should be robust enough to be sung in different styles, whether that's on an acoustic guitar or with all the bells and whistles of an orchestra. It's a theory that clearly strikes a chord with Barry Gibb. 'We grew up in a different world,' he says. 'In those days, there was no such thing as genre.' Gibb puts his views into practice on new album Greenfields, taking some of the greatest songs he sang with the Bee Gees and re-recording them as big-ticket duets in a country setting. He made the album in Nashville with garlanded producer Dave Cobb, roping in some impressive guests.