

CSN and Buffalo Springfield were part of the hall’s Class of 1997.

Stills, who released an autobiography last year titled “Change Partners,” has the distinction of being the first artist to be inducted into the Rock & Roll Hall of Fame twice in one night. Collins has also appeared in HBO’s “Girls,” and her latest book is 2017’s “Cravings: How I Conquered Food.”

Her 2016 duets album “Silver Skies Blue” received a Grammy nomination for Best Folk Album. Married to designer Louis Nelson since 1996, Collins said she is friends with all of her exes, a list that includes actor Stacy Keach. “Stephen and I looked at each other, and said: ‘Why not?’ We started trading emails with each other about what songs we would do,” she said. The idea of Stills and Collins formally playing concerts together didn’t come about until they met up backstage at an AARP-sponsored all-star concert in Florida.
