Peter Green

Black Sabbath's Geezer Butler, Kiss' Paul Stanley, Peter Frampton also mourned guitarist after his death at age 73.

The legendary musician has died.

David Gilmour, Billy Gibbons, Steven Tyler and Christine McVie were among the many performers paying tribute to the original Fleetwood Mac guitarist.

David Gilmour, Billy Gibbons and Bill Wyman will also celebrate Green's music.

There have been more than 40 of these outside projects, which deepen and add to the band's legacy.

They've gone on to far greater success in the years since releasing their first few albums, but for some Fleetwood Mac fans, there's really never been any substitute for the band's original lineup.