Yothu Yindi frontman Mandawuy Yunupingu has died at the age of 56. Yothu Yindi formed in the Yolgnu homelands in Australia’s Northern Territory’s Arnhem Land in 1988. Mandawuy was vocalist and guitarist. Yothu Yindi’s biggest hit was ‘Treaty’ (no. 11, 1991). “Treaty” was written by Australian musician Paul Kelly and Yothu Yindi members Mandawuy Yunupingu,