Jeff Beck

Iommi called Chapman a rock during a difficult time in his career.

See who Ozzy's been working with in advance of his next album.

Queen Elizabeth II made headlines after a 2005 Buckingham Palace event when she failed to recognize four of rock's most famous guitarists.

The rockers are unlikely to ever collaborate on another LP, despite their mutual respect for one another.

Their last full-length appearance together took place more than 35 years ago.