Church says it will picket singer Madonna 's memorial service . Public service will be donation center to raise money for cancer research . Rocker died on May 31 after battle with stomach cancer . Dio , Rainbow and Black Sabbath .
Church says it will picket singer Dio 's memorial service . Public service will host donation center to raise money for cancer fund . Rocker died on May 16 after battle with stomach cancer . Dio fronted Rainbow and Black Sabbath .