Jane's Addiction have now cancelled their entire tour following the onstage bust-up between guitarist Dave Navarro and lead singer Perry Farrell. The duo got into a fight last week in the middle of their Boston show, with eyewitnesses claiming Farrell, 65, began shouting at Navarro during 'Mountain Song.' On Monday, Navarro, 57, told fans the tour would no longer continue. 'Due to a continuing pattern of behavior and the mental health difficulties of our singer Perry Farrell, we have come to the conclusion that we have no choice but to discontinue the current US tour,' Navarro said in a statement....