"My first pair of grown-up shoes, " David Crosby added, without skipping a beat.

WSJ: Crosby, Stills and Nash get jazzy with Marsalis

He had a good excuse: Old friends David Crosby, Graham Nash and Young kept luring him back out on the road to tour.

NPR: Stephen Stills Solo Again (With Help from Friends)

They recently attended an anti-fracking event in Albany with Ruffalo, actors Zooey Deschanel, Alec Baldwin and Hugh Jackman, and singer Lady Gaga, along with other longtime activists such as David Crosby and Paul McCartney.

WSJ: APNewsBreak: Celeb fracking group not registered

The widow and son of musician John Lennon recently attended an anti-fracking event in Albany with Ruffalo, actors Zooey Deschanel, Alec Baldwin and Hugh Jackman, and singer Lady Gaga, along with other longtime activists such as David Crosby and Paul McCartney.

WSJ: NY fracking foes: will become lobby if necessary

Last summer, 32 years after Raitt helped organize a famous "No Nukes" concert, she and her partners in Musicians United for Safe Energy (MUSE) -- Jackson Browne, Graham Nash, David Crosby and others -- put together a follow-up benefit to raise awareness about nuclear power concerns.

CNN: Bonnie Raitt's colorful blues