Holiday and seasonal music dominated the radio waves during December 2012. Joel Mabus' A Parlor Guitar Christmas was reportedly the most played album on folk radio, while John McCutcheon's classic "Christmas in the Trenches" was the top song, according to charts compiled by Richard Gillmann from radio playlists submitted to FOLKDJ-L., an electronic discussion group for DJs and others interested in all folk-based music on the radio. [To view the Top Albums and Songs charts for December 2012, click on the headline.]