Marilyn McCoo and Billy Davis Jr. made their names as members of the Grammy Award-winning group The Fifth Dimension. Together they’ve logged nearly six decades as pop music stalwarts, while also celebrating their golden wedding anniversary in 2019. And now the iconic duo is back with their first studio album in 30 years, "Blackbird: Lennon-McCartney Icons.” In their conversation with "Everything Fab Four" host Ken Womack, they talk about the British Invasion; covering songs by the Beatles, John Lennon, and Paul McCartney;  working with the Wrecking Crew; and their own storied history in pop music.