"He was a powerhouse on stage and always gave his all," recalls guitarist Doug Aldrich, as we all remember Ronnie James Dio. His widow, Wendy Dio, added, "There will never be another Ronnie James Dio, but we want to keep his music alive." When Ronnie James Dio succumbed to cancer on May 16, 2010, he had long been a heavy metal icon. As one of the most charismatic rock singers of all time, he contributed to the legendary status of Rainbow and Black Sabbath in his unique way. Ronnie James Dio was a true musician who first gained attention in the mid-1960s and celebrated his first successes with Elf in 1972. His collaboration with perhaps the best guitarist in the world, Ritchie Blackmore, made Rainbow an absolute cult band in the mid to late 1970s. For Tony Iommi, he sang on "Heaven And Hell.".