Rufus and Martha Wainwright are both stylish singer-songwriters alone, but they've never forgotten their roots or, more importantly, their family, as seen in this holiday tribute, which raises money for the Kate McGarrigle Foundation, named in honor of their late folk-luminary mother and benefiting the McGill University Health Center. They're joined by many members of the Wainwright clan, including aunt Sloan, dad Loudon and half sis Lucy Wainwright Roche, as well as high-profile pals, including Emmylou Harris, Justin Vivian Bond and Cibo Matto.
