Ronnie James Dio

Earlier this month over 80 guitars from rockers like Eddie Van Halen and Slash were auctioned off to raise money for cancer reseach. The Dio Cancer Fund -- a charity that honors the late Ronnie James Dio -- added $100K to an already impressive total to give to the TJ Martell Foundation. Since 2010 wife Wendy Dio has overseen the donation of over $300K.

After Ronnie James Dio died in May 2010, Judas Priest‘s Rob Halford, Black Sabbath‘s Geezer Butler and other members of the hard rock/heavy metal community were quick to express their appreciation in public for the powerful, pint-size singer. A belated Dio tribute came from a rather unlikely source on Feb. 17 when alt-country star Ryan Adams busted out a solo acoustic cover of ‘Holy Diver’ during