Hear the greatest Parsifal of our time sing like a Muppet: Jonas Kaufmann’s Christmas album reviewed

In classical music circles, Christmas arrives with the overture to Handel’s Messiah. Or so they’ll tell you. In truth, festivities kick off when you hear a ping from your phone and glance down at your inbox: OMG — you have to hear this! There follows, as tonic follows dominant, a link to YouTube and the 2014 Christmas in Vienna Medley — the occasion, still barely fathomable to anyone who believes that we share a common European culture, when a quartet of opera singers in full evening dress, and shimmying on the spot like a vicar at a Sunday School disco, attempted to cover George Michael’s ‘Last Christmas’. But not this