Two years after his death at age 62 in May 2012, Bee Gee Robin Gibb’s widow Dwina Gibb compiled a heartbreaker of a solo album from songs Gibb was quietly recording between 2006 and 2011. The 17-track album closes with Sydney, a rough demo Gibb cut using the GarageBand app on his iPad in July 2011, a yearning, autobiographical song she said her husband intended to finish with his brother Barry. The wistful, acoustic tune stands as Gibb’s final recording and could have been the basis for a beautiful Bee Gees ballad if circumstances were different. 50 St. Catherine’s Drive, named for the house address that Gibb was born in on the Isle of Man, is filled with the kind of lush, infectious hook-filled pop songs the Gibb brothers specialized in on ’70s classics like How Can You Mend a Broken Heart. One track here, Cherish, originates from a song Gibb hoped to pitch for a sequel to Barbra Streisand’s Guilty, the 1980 classic that featured the Gibbs’ material. The album, Gibb’s sixth pop solo effort, tops the previous five in warmth and focus. Writing alone, or with son RJ or Peter-John Vettese, Gibb leaves fans with an album that can stand with the Bee Gees’ best.