Hey Welby, PMJ or "Post Modern Jukebox" is is a group founded by Scott Bradlee. They are rotating musical collective which reworks and covers modern music. They were founded in 2011 and have about 1.2 Billion Youtube hits. You should check them out. They are brilliant. https://en.wikipedia.org/wiki/Postmodern_Jukebox
(And, unrelated - - somewhere on the site, you tried to help me post a picture and you said I needed to download it first- - thanks for helping - -I can't even remember where we were. I'll try to do that but even downloading - I then lose them - - I still mess it up)