U2 mega rock band has announced the makeup date for its show that was supposed to take place in June but was postponed because of lead singer Bono's back injury. U2's 360 tour will now hit Denver on May 21, 2011. The concert at Invesco Field at Mile High will be the first American stop on the tour. Bono, whose actual name is Paul Hewson, underwent emergency spine surgery in May. He was released from the hospital and doctors recommend he get extensive rest.