Robin did record Sing Slowly Sisters in 1970, which was to be his second solo album, but he instead rejoined the Bee Gees, meaning this album was released in 2015, three years after his death.
Robin also released three other albums, two of which came out in the 2000s, Magnet and My Favourite Christmas Carols, while his final album, 50 St Catherine’s Drive, was released posthumously in 2014.
As for Maurice, his only solo work was on The Loner, his unreleased album of 1969, otherwise he only worked with his brothers.
Barry has released three solo albums, most recently a bluegrass album called Greenfields on which he collaborated with Dolly Parton, Olivia Newton-John and Sheryl Crow, among others.
Recently, he spoke about his regrets over his brother’s death, saying he felt “survivor’s guilt” over being the last one standing and the relationships he had with his brothers when they died.