Dailey & Vincent Teach Bluegrass & Gospel Duet Singing: Old Time Country Harmony. Soaring harmonies, a seamless vocal blend & a singular commitment to their gospel & old time country repertoire have made Dailey & Vincent the most sensational musical group in bluegrass music today. Darrin Vincent's rich, solid baritone combines with Jamie Dailey's soaring tenor to make every song a thrilling occasion for the listener. Now you can sing along with these amazing musicians as they perform. DVD.