Postmodern Jukebox, also widely known by the acronym PMJ, is a rotating musical collective founded by arranger and pianist Scott Bradlee in 2011. PMJ is known for reworking popular modern music into different vintage genres, especially early 20th century forms such as swing and jazz. Wikipedia
Breaking that down…PMJ takes songs you know, great singers and players, then performs them in an arrangement of an entirely different form than the original. Check out the PMJ YouTube channel for a wide range of illustrations.