Jeff Beck

Toto's Steve Lukather brought it onstage weeks after John Mayer played the instrument with Dead & Company.

Gone but not forgotten.

'Live in Japan 1973, Live in London 1974' arrives on Sept. 15.

Rod Stewart, Ronnie Wood and others also performed.

Cover version was recorded not long before Beck's death in January.

There's a history.

All-star lineup is being spearheaded by Eric Clapton.

Already confirmed guests include Rod Stewart, Billy Gibbons and Derek Trucks, among others.

Former bandmate says late guitarist was untouchable at his best.

Aerosmith guitarist managed to 'adjust the karma' nearly 40 years later.