Hear 'n Aid was a one-time collaboration of various individual hard rock and heavy metal artists in 1985 to raise money for famine relief in Africa. According to Ronnie James Dio's MySpace profile, the project raised $1 million within a year.
Ronnie James Dio
Self [Dio]
Tommy Aldridge
Self
Yngwie Malmsteen
Rudy Sarzo
Eric Bloom
Self [Blue Öyster Cult]
Donald Roeser