Ronnie James Dio (born Ronald James Padavona; July 10, 1942 – May 16, 2010) was an American heavy metal singer, songwriter and musician. He fronted and/or founded numerous groups including Elf, Rainbow, Black Sabbath, Dio and Heaven & Hell. He is credited with popularizing the "metal horns" hand gesture in metal culture and is known for his medieval themed lyrics. Dio possessed a powerful versatile vocal range capable of singing both hard rock and lighter ballads; according to Rainbow/Deep Purple guitarist Ritchie Blackmore upon hearing him sing, "I felt shivers down my spine." Dio sold over 47 million albums throughout his career.