John duetted with Barry Manilow this evening at Proms in the Park in Hyde Park, London. He sang "I Made It Through The Rain" and "Can't Smile Without You". It was on the Red Button channel, and will apparently be available from 10.00 am tomorrow (Sunday) on the BBC iPlayer for seven days.
ETA: the concert is in two parts on the BBC website. John appears after around 42 minutes HERE
http://www.bbc.co.uk/proms/2009/promsinthepark/london.shtml?select=lastnightpart2#video