Rhythm and blues music originated in the African-American communities during the 1940's. Over the past 80 years, R&B has developed subgenres and even the subgenres have subgenres. Doo-wop, hip-hop, funk, soul, and even swamp rock can trace their roots to R&B music. And of course, that amazing baby-making music of slow jams and crystal-clear voices is the heart and soul of the R&B genre. As diverse a genre as R&B is, this episode did not disappoint. The only thing that is greater than the diverse sounds of the vocalists in this episode is the talent. The siblings argue over what constitutes an R&B artist, but the one thing that is not in dispute- the song selections are on point. Join the siblings as they take on the monumental task of ranking the best male R&B vocalists of the 20th century.