Since I grew up in the LDS church (and more to the point, with an LDS chorister mother who is very fond of making the congregation sing the weirder hymns), I wasn't even aware that there's a carol called "The Seven Joys of Mary" until I was an adult. So when I first heard the opening strains of this carol, my immediate thought was, Why is Loreena McKennitt singing "If You Could Hie to Kolob"??
Same music, different lyrics. Pretty carol, though! Enjoy the Loreena rendition.