Reuters/David McNew The singer Elton John broke down in tears during a New Zealand concert on Sunday after he lost his voice due to walking pneumonia and was unable to sing. John cut the Auckland concert short, but apologized in an Instagram post later that day. John had told the crowd early in the concert that he was ill and his voice was "shot", but he was determined to put on a great show. "I played and sang my heart out, until my voice could sing no more.