Another more recent technique I've seen him use is the ''fish mouth' thing - check out the 'let It Be' video from the Royal variety Show on youtube to see it in action. Looks daft, but seems to work - this was 2008 ish back when JBJ was actually trying to regain some of his voice, and he must have been seeing a vocal coach around then. I would be surprised if he was doing much, or any work on his voice on the most recent tour
