"Green, Green" sold more than one million copies in 1963 and was awarded gold status. In May 1963, Sparks stopped touring to focus on developing material and opening a night club in Los Angeles called Ledbetter's, which he intended as a training ground for future group members. By the end of the year, he had formed the Back Porch Majority for this purpose. He passed the role of front man on the concert trail to McGuire. Shortly thereafter, Dolan Ellis left and was replaced by Gene Clark. Clark quit in 1964 and joined Jim McGuinn and David Crosby in the Jet Set, later to become the Byrds. Clark was replaced by Paul Potash, formerly of the folk duo Art and Paul. At the same time, the group's two female singers Jackie Miller and Gayle Caldwell left, They were replaced by Karen Gunderson, formerly of the Sherwood Singers, and soprano Ann White. All three began with the Back Porch Majority and were promoted to the New Christy Minstrels in February 1964. Miller and Caldwell later launched a successful career as the pop/folk duo Jackie and Gayle, which had a recording contract with Capitol Records and a spot as semi-regulars on ABC's Shindig! in the fall of 1964. In 1963, Sparks was contracted to create a film score for Advance to the Rear, featuring Glenn Ford and Stella Stevens. The soundtrack, performed by the New Christy Minstrels, was released in May 1964 as Today and Other Songs from 'Advance to the Rear'''. It was the first complete soundtrack to be recorded in the folk music style. The score is notable for the hit standard "Today", which reached #4 on the Adult Contemporary Charts an d #17 on the Billboard Hot 100, and the album reached the top ten of the Billboard 200 chart.. In the summer of 1964, the New Christy Minstrels, now nine musicians, were featured in the television series Ford Presents the New Christy Minstrels, a weekly variety show sponsored by the Ford Motor Company and broadcast as a summer replacement for Hazel. Each episode had an outdoor setting, with two filmed at the 1964 New York World's Fair and three in the Los Angeles area: Disneyland, Knott's Berry Farm and Pacific Ocean Park. Ford Presents the New Christy Minstrels ran from August 6 to September 10, 1964, airing on NBC from 9:30 to 10:00 p.m. ET on Thursdays.Brooks, Tim,