Blues guru Dr John on voodoo rock

Malcolm John Rebennack more popularly known as Dr John is not only a six times Grammy winner, he's a New Orleans musical icon.

Hitting the headlines in the 70s with his southern voodoo rock, he's since worked with BB King, The Stones, Bob Dylan, Van Morrison, the Allman Brothers and a host of other greats.

The BBC's Andrew Marr spoke to him before he went on stage at the London Jazz festival.