
Wikimedia Commons
The Dale Warland Singers, a Minnesota-based ensemble founded in 1972 and disbanded in 2004, were one of America’s great choirs. Here, they perform the traditional Catalan carol Fum, fum, fum!
https://www.youtube.com/watch?v=126M_eR_Wpc
Incidentally, there’s plenty of speculation about what Fum, fum, fum! might signify, but nobody really seems to know:
http://en.wikipedia.org/wiki/Fum,_Fum,_Fum