"It was essential to keep it secret. We had a code name for recording studios - Dd Jam... We recorded all over the place: L.A., Jamaica, Turkey, Italy, Greece, India, Miami... Mick would check in under names like Mr Gibson 3.3 - very Ocean's Eleven." Dave Stewart went to great lengths to keep Superheavy - his new supergroup with Sir Mick Jagger, A.R. Rahman, Damian Marley and Joss Stone - under wraps.